Question

solve the equation: $-66 = x + 15$
$x = \boldsymbol{\square}$

Explanation:

Step1: Isolate $x$ by subtracting 15

$-66 - 15 = x + 15 - 15$

Step2: Calculate the left-hand side

$x = -66 - 15 = -81$

Answer:

$-81$