x+x-11=90

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Solution for x+x-11=90 equation: 


Simplifying
x + x + -11 = 90

Reorder the terms:
-11 + x + x = 90

Combine like terms: x + x = 2x
-11 + 2x = 90

Solving
-11 + 2x = 90

Solving for variable 'x'.

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

Add '11' to each side of the equation.
-11 + 11 + 2x = 90 + 11

Combine like terms: -11 + 11 = 0
0 + 2x = 90 + 11
2x = 90 + 11

Combine like terms: 90 + 11 = 101
2x = 101

Divide each side by '2'.
x = 50.5

Simplifying
x = 50.5

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