-x+21=-2x+30

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Solution for -x+21=-2x+30 equation:


Simplifying
-1x + 21 = -2x + 30

Reorder the terms:
21 + -1x = -2x + 30

Reorder the terms:
21 + -1x = 30 + -2x

Solving
21 + -1x = 30 + -2x

Solving for variable 'x'.

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

Add '2x' to each side of the equation.
21 + -1x + 2x = 30 + -2x + 2x

Combine like terms: -1x + 2x = 1x
21 + 1x = 30 + -2x + 2x

Combine like terms: -2x + 2x = 0
21 + 1x = 30 + 0
21 + 1x = 30

Add '-21' to each side of the equation.
21 + -21 + 1x = 30 + -21

Combine like terms: 21 + -21 = 0
0 + 1x = 30 + -21
1x = 30 + -21

Combine like terms: 30 + -21 = 9
1x = 9

Divide each side by '1'.
x = 9

Simplifying
x = 9

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