7x+15-3x=87

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Solution for 7x+15-3x=87 equation:


Simplifying
7x + 15 + -3x = 87

Reorder the terms:
15 + 7x + -3x = 87

Combine like terms: 7x + -3x = 4x
15 + 4x = 87

Solving
15 + 4x = 87

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 = 87 + -15

Combine like terms: 15 + -15 = 0
0 + 4x = 87 + -15
4x = 87 + -15

Combine like terms: 87 + -15 = 72
4x = 72

Divide each side by '4'.
x = 18

Simplifying
x = 18

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