3x+8+5x-20=90

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Solution for 3x+8+5x-20=90 equation:


Simplifying
3x + 8 + 5x + -20 = 90

Reorder the terms:
8 + -20 + 3x + 5x = 90

Combine like terms: 8 + -20 = -12
-12 + 3x + 5x = 90

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

Solving
-12 + 8x = 90

Solving for variable 'x'.

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

Add '12' to each side of the equation.
-12 + 12 + 8x = 90 + 12

Combine like terms: -12 + 12 = 0
0 + 8x = 90 + 12
8x = 90 + 12

Combine like terms: 90 + 12 = 102
8x = 102

Divide each side by '8'.
x = 12.75

Simplifying
x = 12.75

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