How do you solve $8 x = 4 (6 x + 20)$ $8x = 4( 6x + 20)$ ?

Question

1149 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-07-06T17:27:50

$x = - 5$ $x = -5$

1. Distribute the 4 to everything inside the parentheses.

$8 x = 4 (6 x + 20)$ $8x = 4(6x + 20)$
$8 x = 24 x + 80$ $8x = 24x + 80$

2. Subtract 24x from both sides to get the variable on one side only.

$8x - 24x = cancel(color(red)(24x)) + 80 cancel(color(red)(- 24x))$

$-16x = 80$

3. Divide both sides by -16 to isolate x.

$(-16x)/(-16) = 80/(-16)$

$x = -5$

That's your answer!

How do you solve 8x = 4( 6x + 20)8x=4(6x+20)8x = 4( 6x + 20)?