x+x-18+x+x-18=84

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Solution for x+x-18+x+x-18=84 equation:


Simplifying
x + x + -18 + x + x + -18 = 84

Reorder the terms:
-18 + -18 + x + x + x + x = 84

Combine like terms: -18 + -18 = -36
-36 + x + x + x + x = 84

Combine like terms: x + x = 2x
-36 + 2x + x + x = 84

Combine like terms: 2x + x = 3x
-36 + 3x + x = 84

Combine like terms: 3x + x = 4x
-36 + 4x = 84

Solving
-36 + 4x = 84

Solving for variable 'x'.

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

Add '36' to each side of the equation.
-36 + 36 + 4x = 84 + 36

Combine like terms: -36 + 36 = 0
0 + 4x = 84 + 36
4x = 84 + 36

Combine like terms: 84 + 36 = 120
4x = 120

Divide each side by '4'.
x = 30

Simplifying
x = 30

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