3x+56+15x-20=90

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Solution for 3x+56+15x-20=90 equation:


Simplifying
3x + 56 + 15x + -20 = 90

Reorder the terms:
56 + -20 + 3x + 15x = 90

Combine like terms: 56 + -20 = 36
36 + 3x + 15x = 90

Combine like terms: 3x + 15x = 18x
36 + 18x = 90

Solving
36 + 18x = 90

Solving for variable 'x'.

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

Add '-36' to each side of the equation.
36 + -36 + 18x = 90 + -36

Combine like terms: 36 + -36 = 0
0 + 18x = 90 + -36
18x = 90 + -36

Combine like terms: 90 + -36 = 54
18x = 54

Divide each side by '18'.
x = 3

Simplifying
x = 3

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