13x+18+7x+12=90

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Solution for 13x+18+7x+12=90 equation:


Simplifying
13x + 18 + 7x + 12 = 90

Reorder the terms:
18 + 12 + 13x + 7x = 90

Combine like terms: 18 + 12 = 30
30 + 13x + 7x = 90

Combine like terms: 13x + 7x = 20x
30 + 20x = 90

Solving
30 + 20x = 90

Solving for variable 'x'.

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

Add '-30' to each side of the equation.
30 + -30 + 20x = 90 + -30

Combine like terms: 30 + -30 = 0
0 + 20x = 90 + -30
20x = 90 + -30

Combine like terms: 90 + -30 = 60
20x = 60

Divide each side by '20'.
x = 3

Simplifying
x = 3

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