30-4x=x-9

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Solution for 30-4x=x-9 equation:


Simplifying
30 + -4x = x + -9

Reorder the terms:
30 + -4x = -9 + x

Solving
30 + -4x = -9 + 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 + -4x + -1x = -9 + x + -1x

Combine like terms: -4x + -1x = -5x
30 + -5x = -9 + x + -1x

Combine like terms: x + -1x = 0
30 + -5x = -9 + 0
30 + -5x = -9

Add '-30' to each side of the equation.
30 + -30 + -5x = -9 + -30

Combine like terms: 30 + -30 = 0
0 + -5x = -9 + -30
-5x = -9 + -30

Combine like terms: -9 + -30 = -39
-5x = -39

Divide each side by '-5'.
x = 7.8

Simplifying
x = 7.8

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