(x+18)+3x=90

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Solution for (x+18)+3x=90 equation:


Simplifying
(x + 18) + 3x = 90

Reorder the terms:
(18 + x) + 3x = 90

Remove parenthesis around (18 + x)
18 + x + 3x = 90

Combine like terms: x + 3x = 4x
18 + 4x = 90

Solving
18 + 4x = 90

Solving for variable 'x'.

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

Add '-18' to each side of the equation.
18 + -18 + 4x = 90 + -18

Combine like terms: 18 + -18 = 0
0 + 4x = 90 + -18
4x = 90 + -18

Combine like terms: 90 + -18 = 72
4x = 72

Divide each side by '4'.
x = 18

Simplifying
x = 18

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