8x+13+12x-7=90

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Solution for 8x+13+12x-7=90 equation:


Simplifying
8x + 13 + 12x + -7 = 90

Reorder the terms:
13 + -7 + 8x + 12x = 90

Combine like terms: 13 + -7 = 6
6 + 8x + 12x = 90

Combine like terms: 8x + 12x = 20x
6 + 20x = 90

Solving
6 + 20x = 90

Solving for variable 'x'.

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

Add '-6' to each side of the equation.
6 + -6 + 20x = 90 + -6

Combine like terms: 6 + -6 = 0
0 + 20x = 90 + -6
20x = 90 + -6

Combine like terms: 90 + -6 = 84
20x = 84

Divide each side by '20'.
x = 4.2

Simplifying
x = 4.2

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