0.4r=x-12

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Solution for 0.4r=x-12 equation: 


Simplifying
0.4r = x + -12

Reorder the terms:
0.4r = -12 + x

Solving
0.4r = -12 + x

Solving for variable 'r'.

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

Divide each side by '0.4'.
r = -30 + 2.5x

Simplifying
r = -30 + 2.5x

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