3x+12+2x+8=90

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Solution for 3x+12+2x+8=90 equation:


Simplifying
3x + 12 + 2x + 8 = 90

Reorder the terms:
12 + 8 + 3x + 2x = 90

Combine like terms: 12 + 8 = 20
20 + 3x + 2x = 90

Combine like terms: 3x + 2x = 5x
20 + 5x = 90

Solving
20 + 5x = 90

Solving for variable 'x'.

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

Add '-20' to each side of the equation.
20 + -20 + 5x = 90 + -20

Combine like terms: 20 + -20 = 0
0 + 5x = 90 + -20
5x = 90 + -20

Combine like terms: 90 + -20 = 70
5x = 70

Divide each side by '5'.
x = 14

Simplifying
x = 14

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