Question

I need help with this question.

Answer 1

a) 4x

b)

`8 \cdot \: 9y - 8 \cdot2`

and

8(9y-2)

Explanation:

For part a) We want to simplify:

`x + x + x + x`

This gives us

`4x`

For part b), we factorize

`72y - 16`

There is a common factor of 8

`72y - 16 = 8 * 9y - 8 * 2`

This also equals:

`72y - 16 = 8 (9y - 2)`