1x+18+1x-20=90

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Solution for 1x+18+1x-20=90 equation:


Simplifying
1x + 18 + 1x + -20 = 90

Reorder the terms:
18 + -20 + 1x + 1x = 90

Combine like terms: 18 + -20 = -2
-2 + 1x + 1x = 90

Combine like terms: 1x + 1x = 2x
-2 + 2x = 90

Solving
-2 + 2x = 90

Solving for variable 'x'.

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

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

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

Combine like terms: 90 + 2 = 92
2x = 92

Divide each side by '2'.
x = 46

Simplifying
x = 46

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