18+x=89-x

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Solution for 18+x=89-x equation:


Simplifying
18 + x = 89 + -1x

Solving
18 + x = 89 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
18 + x + x = 89 + -1x + x

Combine like terms: x + x = 2x
18 + 2x = 89 + -1x + x

Combine like terms: -1x + x = 0
18 + 2x = 89 + 0
18 + 2x = 89

Add '-18' to each side of the equation.
18 + -18 + 2x = 89 + -18

Combine like terms: 18 + -18 = 0
0 + 2x = 89 + -18
2x = 89 + -18

Combine like terms: 89 + -18 = 71
2x = 71

Divide each side by '2'.
x = 35.5

Simplifying
x = 35.5

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