30-2x=12-8r

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Solution for 30-2x=12-8r equation: 


Simplifying
30 + -2x = 12 + -8r

Solving
30 + -2x = 12 + -8r

Solving for variable 'x'.

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

Add '-30' to each side of the equation.
30 + -30 + -2x = 12 + -30 + -8r

Combine like terms: 30 + -30 = 0
0 + -2x = 12 + -30 + -8r
-2x = 12 + -30 + -8r

Combine like terms: 12 + -30 = -18
-2x = -18 + -8r

Divide each side by '-2'.
x = 9 + 4r

Simplifying
x = 9 + 4r

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