9x-87=5x-7

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Solution for 9x-87=5x-7 equation:


Simplifying
9x + -87 = 5x + -7

Reorder the terms:
-87 + 9x = 5x + -7

Reorder the terms:
-87 + 9x = -7 + 5x

Solving
-87 + 9x = -7 + 5x

Solving for variable 'x'.

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

Add '-5x' to each side of the equation.
-87 + 9x + -5x = -7 + 5x + -5x

Combine like terms: 9x + -5x = 4x
-87 + 4x = -7 + 5x + -5x

Combine like terms: 5x + -5x = 0
-87 + 4x = -7 + 0
-87 + 4x = -7

Add '87' to each side of the equation.
-87 + 87 + 4x = -7 + 87

Combine like terms: -87 + 87 = 0
0 + 4x = -7 + 87
4x = -7 + 87

Combine like terms: -7 + 87 = 80
4x = 80

Divide each side by '4'.
x = 20

Simplifying
x = 20

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