Question

How do you simplify `4(2y + 5z) - 20z`?

Answer 1

`=color(blue)(8y`

Explanation:

`color(blue)(4)(2y+5z)−20z`

Here `color(blue)(4` needs to be multiplied with both terms within first bracket:

`=color(blue)(4) * (2y) +color(blue)(4) *(5z)−20z`

`=8y +20z−20z`

`=8y +0`

`=color(blue)(8y`