Bài 1 : Tìm x:
a) (x-34).15=0
b) 18.(x-16)=18 c) (x-55).17=0
d) 25.(x-75)=25 e) 7.(2x+1)=21
f) 4.(3x-2)=16
Bài 2 Tìm x:
a) (x-34)-15=0
b) 18-(x-16)=18 c) (x-55)-17=0
d) 25-(x-75)=25 e) 7+(2x+1)=21
f) 4+(3x-2)=16
Bài 3: Tìm x:
a) (x-3)-120=0
b) 156-(x+61)=82
c) 96-3(x+1)=42 d) 124+(118-x)=217
e) (x-25)-115=10+5
f) 541+(218-x)=735 g) 125+(145-x)=175
h) 435+(6x-8)=457
i) 96-3(x+1)=42
Bài 4: Tìm x:
a) 151-2(x-6)=2227:17
b) 12(x-1):3=64-8
c) 60-(x:6+4)=54 d) 25+25.x=64+36
e) 5x-36:18=13
f) (5x-36):18=13 g) 7+(2x+1)=21
h) 4+(3x-2)=16
i) 12x-33=9.27
Bài 5 Tìm x:
a) 1+2x=15
b) 13-4x=5
c) 2(x+1)-3=9 d)10-3(12-x)=1
e) 62-(2x-3):3=13
f) 71+(26-3x):2=13 g) 71+(26-3x):2=75
h) 25+68(5x+7)=29
i) 15:(4x-7)+28=4:(4x-7)+39
Bài 6: Tìm x
a) x+2x=15
b) 5x-4x=5
c) x+8x=9 d) [(10-x).2+5]:3-2=3
e) 2<><>
f) x<10 g)="">10>
h)
i)
BÀI TẬP BUỔI 3: TÌM X Bài 1 : Tìm x: (x-34).15=0 18.(x-16)=18 (x-55).17=0 25.(x-75)=25 7.(2x+1)=21 4.(3x-2)=16 Bài 2 Tìm x: (x-34)-15=0 18-(x-16)=18 (x-55)-17=0 25-(x-75)=25 7+(2x+1)=21 4+(3x-2)=16 Bài 3: Tìm x: (x-3)-120=0 156-(x+61)=82 96-3(x+1)=42 124+(118-x)=217 (x-25)-115=10+5 541+(218-x)=735 125+(145-x)=175 435+(6x-8)=457 96-3(x+1)=42 Bài 4: Tìm x: 151-2(x-6)=2227:17 12(x-1):3=64-8 60-(x:6+4)=54 25+25.x=64+36 5x-36:18=13 (5x-36):18=13 7+(2x+1)=21 4+(3x-2)=16 12x-33=9.27 Bài 5 Tìm x: 1+2x=15 13-4x=5 2(x+1)-3=9 d)10-3(12-x)=1 e) 62-(2x-3):3=13 f) 71+(26-3x):2=13 g) 71+(26-3x):2=75 h) 25+68(5x+7)=29 i) 15:(4x-7)+28=4:(4x-7)+39 Bài 6: Tìm x x+2x=15 5x-4x=5 x+8x=9 [(10-x).2+5]:3-2=3 2<x<5 x<10 BÀI TẬP BUỔI 3: TÌM X Bài 1 : Tìm x: (x-34).15=0 18.(x-16)=18 (x-55).17=0 25.(x-75)=25 7.(2x+1)=21 4.(3x-2)=16 Bài 2 Tìm x: (x-34)-15=0 18-(x-16)=18 (x-55)-17=0 25-(x-75)=25 7+(2x+1)=21 4+(3x-2)=16 Bài 3: Tìm x: (x-3)-120=0 156-(x+61)=82 96-3(x+1)=42 124+(118-x)=217 (x-25)-115=10+5 541+(218-x)=735 125+(145-x)=175 435+(6x-8)=457 96-3(x+1)=42 Bài 4: Tìm x: 151-2(x-6)=2227:17 12(x-1):3=64-8 60-(x:6+4)=54 25+25.x=64+36 5x-36:18=13 (5x-36):18=13 7+(2x+1)=21 4+(3x-2)=16 12x-33=9.27 Bài 5 Tìm x: 1+2x=15 13-4x=5 2(x+1)-3=9 d)10-3(12-x)=1 e) 62-(2x-3):3=13 f) 71+(26-3x):2=13 g) 71+(26-3x):2=75 h) 25+68(5x+7)=29 i) 15:(4x-7)+28=4:(4x-7)+39 Bài 6: Tìm x x+2x=15 5x-4x=5 x+8x=9 [(10-x).2+5]:3-2=3 2<x<5 x<10 BÀI KIỂM TRA SỐ 1 Thêi gian :45’ Hä vµ tªn häc sinh:................................ C©u 1 (4.5 ®iÓm) Thùc hiÖn c¸c phÐp tÝnh 22.47 + 2.38.11 + 15.22 80 - (4.25-7.8) 23.75+25.23 +180 80- (4.25 – 3.8) 80- (4.25 – 3.8) 2448: [119 – (23 -6)] + (51- 49) [1570 – 4.(25.19 – 25. 9)] : [2. (27- 8)] 2x17x16+36x21+8x4x62 32x25+32x75+68x79+68x21 C©u 2 (4.5 ®iÓm)T×m x a) x – 72 : 9 = 7.4 d) 231 – (x -6) = 1339 : 13 b). (x + 4) = 121 – 7.3 e) [(6.x - 39) : 3] .79 =395 c) (5x – 5 ).2 =60 C©u 3 (1 ®iÓm) TÝnh tæng: a) A=1+2+3+4+...+100 b) B = 5 + 10 +15 +. + 1995 + 2000 + 2005 BÀI KIỂM TRA SỐ 1 Thêi gian :45’ Hä vµ tªn häc sinh:................................ C©u 1 (4.5 ®iÓm) Thùc hiÖn c¸c phÐp tÝnh 22.47 + 2.38.11 + 15.22 80 - (4.25-7.8) 23.75+25.23 +180 80- (4.25 – 3.8) 80- (4.25 – 3.8) 2448: [119 – (23 -6)] + (51- 49) [1570 – 4.(25.19 – 25. 9)] : [2. (27- 8)] 2x17x16+36x21+8x4x62 32x25+32x75+68x79+68x21 C©u 2 (4.5 ®iÓm)T×m x a) x – 72 : 9 = 7.4 d) 231 – (x -6) = 1339 : 13 b). (x + 4) = 121 – 7.3 e) [(6.x - 39) : 3] .79 =395 c) (5x – 5 ).2 =60 C©u 3 (1 ®iÓm) TÝnh tæng: a) A=1+2+3+4+...+100 b) B = 5 + 10 +15 +. + 1995 + 2000 + 2005 BÀI KIỂM TRA SỐ 1 Thêi gian :45’ Hä vµ tªn häc sinh:................................ C©u 1 (4.5 ®iÓm) Thùc hiÖn c¸c phÐp tÝnh 22.47 + 2.38.11 + 15.22 80 - (4.25-7.8) 23.75+25.23 +180 80- (4.25 – 3.8) 80- (4.25 – 3.8) 2448: [119 – (23 -6)] + (51- 49) [1570 – 4.(25.19 – 25. 9)] : [2. (27- 8)] 2x17x16+36x21+8x4x62 32x25+32x75+68x79+68x21 C©u 2 (4.5 ®iÓm)T×m x a) x – 72 : 9 = 7.4 d) 231 – (x -6) = 1339 : 13 b). (x + 4) = 121 – 7.3 e) [(6.x - 39) : 3] .79 =395 c) (5x – 5 ).2 =60 C©u 3 (1 ®iÓm) TÝnh tæng: a) A=1+2+3+4+...+100 b) B = 5 + 10 +15 +. + 1995 + 2000 + 2005
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