x+15+4x+12=87

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Solution for x+15+4x+12=87 equation:


Simplifying
x + 15 + 4x + 12 = 87

Reorder the terms:
15 + 12 + x + 4x = 87

Combine like terms: 15 + 12 = 27
27 + x + 4x = 87

Combine like terms: x + 4x = 5x
27 + 5x = 87

Solving
27 + 5x = 87

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 + 5x = 87 + -27

Combine like terms: 27 + -27 = 0
0 + 5x = 87 + -27
5x = 87 + -27

Combine like terms: 87 + -27 = 60
5x = 60

Divide each side by '5'.
x = 12

Simplifying
x = 12

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