x+3-2x+6=18

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Solution for x+3-2x+6=18 equation:


Simplifying
x + 3 + -2x + 6 = 18

Reorder the terms:
3 + 6 + x + -2x = 18

Combine like terms: 3 + 6 = 9
9 + x + -2x = 18

Combine like terms: x + -2x = -1x
9 + -1x = 18

Solving
9 + -1x = 18

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + -1x = 18 + -9

Combine like terms: 9 + -9 = 0
0 + -1x = 18 + -9
-1x = 18 + -9

Combine like terms: 18 + -9 = 9
-1x = 9

Divide each side by '-1'.
x = -9

Simplifying
x = -9

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