Solve equations with x on both sides
8th grade (Year 9 in England) · 16 questions · Common Core: 8.EE.C.7.B · England: KS3 Algebra, GCSE Foundation Algebra
Name
Date
Score/ 16
Question 1
Sam solved 3x − 7 = x + 1 by adding 1x to both sides. Explain the mistake by finding the correct value of x.
x =
Question 2
Solve: 2x + 15 = 3x + 16
2x + 15=3x + 16
x =
Question 3
Solve: −4x − 3 = x + 7
x =
Question 4
Yuki solved 7x = 4x − 12 by adding 4x to both sides. Explain the mistake by finding the correct value of x.
x =
Question 5
Solve: 9x + 7 = 4x + 67
9x + 7=4x + 67
x =
Question 6
Solve: −2x + 9 = 6x + 41
x =
Question 7
Ana solved 7x − 7 = 5x + 13 by adding 5x to both sides. Explain the mistake by finding the correct value of x.
x =
Question 8
Solve: 9x − 6 = 3x + 66
9x − 6=3x + 66
x =
Question 9
Solve: −5x + 2 = x + 26
x =
Question 10
Hiro solved 5x + 4 = 2x + 34 by adding 2x to both sides. Explain the mistake by finding the correct value of x.
x =
Question 11
Solve: 5x − 9 = 8x
5x − 9=8x
x =
Question 12
Solve: −6x − 3 = x − 10
x =
Question 13
Felix solved 3x − 8 = 2x − 4 by adding 2x to both sides. Explain the mistake by finding the correct value of x.
x =
Question 14
Solve: 3x − 2 = x − 6
3x − 2=x − 6
x =
Question 15
Solve: −3x + 7 = 3x + 1
x =
Question 16
Yuki solved 6x − 1 = 4x − 7 by adding 4x to both sides. Explain the mistake by finding the correct value of x.
x =
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