3x-18=-x+30

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Solution for 3x-18=-x+30 equation:


Simplifying
3x + -18 = -1x + 30

Reorder the terms:
-18 + 3x = -1x + 30

Reorder the terms:
-18 + 3x = 30 + -1x

Solving
-18 + 3x = 30 + -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 + 3x + x = 30 + -1x + x

Combine like terms: 3x + x = 4x
-18 + 4x = 30 + -1x + x

Combine like terms: -1x + x = 0
-18 + 4x = 30 + 0
-18 + 4x = 30

Add '18' to each side of the equation.
-18 + 18 + 4x = 30 + 18

Combine like terms: -18 + 18 = 0
0 + 4x = 30 + 18
4x = 30 + 18

Combine like terms: 30 + 18 = 48
4x = 48

Divide each side by '4'.
x = 12

Simplifying
x = 12

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