-12=4(r-5)

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Solution for -12=4(r-5) equation:


Simplifying
-12 = 4(r + -5)

Reorder the terms:
-12 = 4(-5 + r)
-12 = (-5 * 4 + r * 4)
-12 = (-20 + 4r)

Solving
-12 = -20 + 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
-12 + -4r = -20 + 4r + -4r

Combine like terms: 4r + -4r = 0
-12 + -4r = -20 + 0
-12 + -4r = -20

Add '12' to each side of the equation.
-12 + 12 + -4r = -20 + 12

Combine like terms: -12 + 12 = 0
0 + -4r = -20 + 12
-4r = -20 + 12

Combine like terms: -20 + 12 = -8
-4r = -8

Divide each side by '-4'.
r = 2

Simplifying
r = 2

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