Question

1. 2(r + 10) = -2(15r + 10)

Explanation:

Step1: Expand both sides of the equation

$2r + 20 = -30r - 20$

Step2: Add $30r$ to both sides

$2r + 30r + 20 = -20$
$32r + 20 = -20$

Step3: Subtract 20 from both sides

$32r = -20 - 20$
$32r = -40$

Step4: Solve for $r$ by dividing by 32

$r = \frac{-40}{32} = -\frac{5}{4}$

Answer:

$r = -\frac{5}{4}$