Question

1. -15(7 + 10x) = -2055

Explanation:

Step1: Divide both sides by -15

$\frac{-15(7+10x)}{-15} = \frac{-2055}{-15}$
$7 + 10x = 137$

Step2: Subtract 7 from both sides

$7 + 10x - 7 = 137 - 7$
$10x = 130$

Step3: Divide both sides by 10

$\frac{10x}{10} = \frac{130}{10}$
$x = 13$

Answer:

$x = 13$