30-3x=x-20

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Solution for 30-3x=x-20 equation:


Simplifying
30 + -3x = x + -20

Reorder the terms:
30 + -3x = -20 + x

Solving
30 + -3x = -20 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
30 + -3x + -1x = -20 + x + -1x

Combine like terms: -3x + -1x = -4x
30 + -4x = -20 + x + -1x

Combine like terms: x + -1x = 0
30 + -4x = -20 + 0
30 + -4x = -20

Add '-30' to each side of the equation.
30 + -30 + -4x = -20 + -30

Combine like terms: 30 + -30 = 0
0 + -4x = -20 + -30
-4x = -20 + -30

Combine like terms: -20 + -30 = -50
-4x = -50

Divide each side by '-4'.
x = 12.5

Simplifying
x = 12.5

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