# How do you solve 11x-21=8x+15?

Mar 25, 2018

$x = 12$

#### Explanation:

So you first want to get everything with an $x$ to one side. So we add $21$ to both sides:

$11 x - 21 = 8 x + 15 \text{ } | + 21$

$11 x = 8 x + 36$

And then subtract $8 x$ from both sides:

$11 x = 8 x + 36 \text{ } | - 8 x$

$3 x = 36$

For the final step, we divide by $3$ on both sides:

$3 x = 36 \text{ } | \div 3$

$x = 12$