5x+12+8x-3=90

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Solution for 5x+12+8x-3=90 equation:


Simplifying
5x + 12 + 8x + -3 = 90

Reorder the terms:
12 + -3 + 5x + 8x = 90

Combine like terms: 12 + -3 = 9
9 + 5x + 8x = 90

Combine like terms: 5x + 8x = 13x
9 + 13x = 90

Solving
9 + 13x = 90

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + 13x = 90 + -9

Combine like terms: 9 + -9 = 0
0 + 13x = 90 + -9
13x = 90 + -9

Combine like terms: 90 + -9 = 81
13x = 81

Divide each side by '13'.
x = 6.230769231

Simplifying
x = 6.230769231

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