Question

8 - 2x = 5(x - 2)

Which step is not part of solving the problem?
A) 18 = 7x
B) 8 = 7x - 10
C) 8 - 2x = 5x - 2
D) 8 - 2x = 5x - 10
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Answer 1

Answer: c

Explanation:

[Expand bracket on the right]

8 - 2x = 5(x-2)

[Move x to the right hand side]

8 - 2x = 5x - 10 {letter d}

(+2x)

[Move whole numbers to the left]

8 = 7x - 10 {letter b}

(+10)

[solve for x]

18 = 7x {letter a}

(Divide by 7)

x =
`(18)/(7)`