7x-10+13x-10=90

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Solution for 7x-10+13x-10=90 equation:


Simplifying
7x + -10 + 13x + -10 = 90

Reorder the terms:
-10 + -10 + 7x + 13x = 90

Combine like terms: -10 + -10 = -20
-20 + 7x + 13x = 90

Combine like terms: 7x + 13x = 20x
-20 + 20x = 90

Solving
-20 + 20x = 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 + 20x = 90 + 20

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

Combine like terms: 90 + 20 = 110
20x = 110

Divide each side by '20'.
x = 5.5

Simplifying
x = 5.5

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