15-42=3(x-1)-9

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Solution for 15-42=3(x-1)-9 equation:


Simplifying
15 + -42 = 3(x + -1) + -9

Combine like terms: 15 + -42 = -27
-27 = 3(x + -1) + -9

Reorder the terms:
-27 = 3(-1 + x) + -9
-27 = (-1 * 3 + x * 3) + -9
-27 = (-3 + 3x) + -9

Reorder the terms:
-27 = -3 + -9 + 3x

Combine like terms: -3 + -9 = -12
-27 = -12 + 3x

Solving
-27 = -12 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
-27 + -3x = -12 + 3x + -3x

Combine like terms: 3x + -3x = 0
-27 + -3x = -12 + 0
-27 + -3x = -12

Add '27' to each side of the equation.
-27 + 27 + -3x = -12 + 27

Combine like terms: -27 + 27 = 0
0 + -3x = -12 + 27
-3x = -12 + 27

Combine like terms: -12 + 27 = 15
-3x = 15

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

Simplifying
x = -5

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