87-3x=3x+15

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Solution for 87-3x=3x+15 equation:


Simplifying
87 + -3x = 3x + 15

Reorder the terms:
87 + -3x = 15 + 3x

Solving
87 + -3x = 15 + 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.
87 + -3x + -3x = 15 + 3x + -3x

Combine like terms: -3x + -3x = -6x
87 + -6x = 15 + 3x + -3x

Combine like terms: 3x + -3x = 0
87 + -6x = 15 + 0
87 + -6x = 15

Add '-87' to each side of the equation.
87 + -87 + -6x = 15 + -87

Combine like terms: 87 + -87 = 0
0 + -6x = 15 + -87
-6x = 15 + -87

Combine like terms: 15 + -87 = -72
-6x = -72

Divide each side by '-6'.
x = 12

Simplifying
x = 12

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