# How do you solve -4r + 8+ 9r = 15?

$- 4 r + 8 + 9 r = 15$
$- 4 r + 9 r + 8 = 15$
$5 r + 8 = 15$
$5 r = 15 - 8$
$5 r = 7$
$r = \frac{7}{5}$