4x-42=-12+x+15

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Solution for 4x-42=-12+x+15 equation:


Simplifying
4x + -42 = -12 + x + 15

Reorder the terms:
-42 + 4x = -12 + x + 15

Reorder the terms:
-42 + 4x = -12 + 15 + x

Combine like terms: -12 + 15 = 3
-42 + 4x = 3 + x

Solving
-42 + 4x = 3 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-42 + 4x + -1x = 3 + x + -1x

Combine like terms: 4x + -1x = 3x
-42 + 3x = 3 + x + -1x

Combine like terms: x + -1x = 0
-42 + 3x = 3 + 0
-42 + 3x = 3

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

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

Combine like terms: 3 + 42 = 45
3x = 45

Divide each side by '3'.
x = 15

Simplifying
x = 15

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