15-4x=42-15

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Solution for 15-4x=42-15 equation: 


Simplifying
15 + -4x = 42 + -15

Combine like terms: 42 + -15 = 27
15 + -4x = 27

Solving
15 + -4x = 27

Solving for variable 'x'.

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

Add '-15' to each side of the equation.
15 + -15 + -4x = 27 + -15

Combine like terms: 15 + -15 = 0
0 + -4x = 27 + -15
-4x = 27 + -15

Combine like terms: 27 + -15 = 12
-4x = 12

Divide each side by '-4'.
x = -3

Simplifying
x = -3

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