Question

Steps for solving 5(2x - 8) = 20 are shown. 5(2x-8)= 20 10x - 40 = 20 10x - 40+ 40 = 20 + 40 10x = 60 10x 60 10 10 x = 6 Original Equation Which of these is not part of the solution process?

Answer 1

(d) Using the commutative property

Explanation:

Given

The above steps

Required

Which is not part of the process

We have:

`5(2x-8)= 20`

`10x - 40 = 20`

`10x - 40+ 40 = 20 + 40`

`10x = 60`

`(10x)/(10) = (60)/(10)`

`x = 6`

Comparing the above steps with the given list of options, we can see that the commutative property is not applied at all.

Other properties are:

`5(2x-8)= 20` ---- Distributive

`10x - 40+ 40 = 20 + 40` ---- Like terms

`(10x)/(10) = (60)/(10)` --- Isolating the variable