-20=5(r-5)

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Solution for -20=5(r-5) equation:


Simplifying
-20 = 5(r + -5)

Reorder the terms:
-20 = 5(-5 + r)
-20 = (-5 * 5 + r * 5)
-20 = (-25 + 5r)

Solving
-20 = -25 + 5r

Solving for variable 'r'.

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

Add '-5r' to each side of the equation.
-20 + -5r = -25 + 5r + -5r

Combine like terms: 5r + -5r = 0
-20 + -5r = -25 + 0
-20 + -5r = -25

Add '20' to each side of the equation.
-20 + 20 + -5r = -25 + 20

Combine like terms: -20 + 20 = 0
0 + -5r = -25 + 20
-5r = -25 + 20

Combine like terms: -25 + 20 = -5
-5r = -5

Divide each side by '-5'.
r = 1

Simplifying
r = 1

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