Question

I need help with this question.

Answer 1

Answer:

a) 4x

b)

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

and

8(9y-2)

Step-by-step 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

$72y - 16 = 8 \times 9y - 8 \times 2$

This also equals:

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