-20=4r

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Solution for -20=4r equation:


Simplifying
-20 = 4r

Solving
-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.
-20 + -4r = 4r + -4r

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

Add '20' to each side of the equation.
-20 + 20 + -4r = 0 + 20

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

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

Divide each side by '-4'.
r = -5

Simplifying
r = -5

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