Question

18 = 13 - 6y - 7

Explanation:

Step1: Combine like terms on the right side.

$18 = (13 - 7) - 6y$
$18 = 6 - 6y$

Step2: Subtract 6 from both sides.

$18 - 6 = 6 - 6y - 6$
$12 = -6y$

Step3: Divide both sides by -6.

$\frac{12}{-6} = \frac{-6y}{-6}$
$-2 = y$

Answer:

$y = -2$