-3(x+9)=-42

Solution for -3(x+9)=-42 equation:

Simplifying
-3(x + 9) = -42

Reorder the terms:
-3(9 + x) = -42
(9 * -3 + x * -3) = -42
(-27 + -3x) = -42

Solving
-27 + -3x = -42

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '27' to each side of the equation.
-27 + 27 + -3x = -42 + 27

Combine like terms: -27 + 27 = 0
0 + -3x = -42 + 27
-3x = -42 + 27

Combine like terms: -42 + 27 = -15
-3x = -15

Divide each side by '-3'.
x = 5

Simplifying
x = 5