Question

1. 7 = 5y - 13 - y

Explanation:

Step1: Combine like terms

$7 = (5y - y) - 13$
$7 = 4y - 13$

Step2: Isolate the term with $y$

$7 + 13 = 4y$
$20 = 4y$

Step3: Solve for $y$

$y = \frac{20}{4}$

Answer:

$y = 5$