4x-12+-2x+21=PR

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Solution for 4x-12+-2x+21=PR equation:


Simplifying
4x + -12 + -2x + 21 = PR

Reorder the terms:
-12 + 21 + 4x + -2x = PR

Combine like terms: -12 + 21 = 9
9 + 4x + -2x = PR

Combine like terms: 4x + -2x = 2x
9 + 2x = PR

Solving
9 + 2x = PR

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + 2x = -9 + PR

Combine like terms: 9 + -9 = 0
0 + 2x = -9 + PR
2x = -9 + PR

Divide each side by '2'.
x = -4.5 + 0.5PR

Simplifying
x = -4.5 + 0.5PR

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