Question

How do you solve `x+ 3x = 40/ 2`?

Answer 1

`x=5`

Explanation:

`x+3x=4x`
and
`40/2=20`

So `x+3x=40/2color(white)("XX")rarrcolor(white)("XX")4x=20`

Dividing both sides by `4` gives
`color(white)("XXX")cancel(4)x=cancel(20)^5`

`color(white)("XXX")x=5`