-2(r+5)=8r-20

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Solution for -2(r+5)=8r-20 equation:


Simplifying
-2(r + 5) = 8r + -20

Reorder the terms:
-2(5 + r) = 8r + -20
(5 * -2 + r * -2) = 8r + -20
(-10 + -2r) = 8r + -20

Reorder the terms:
-10 + -2r = -20 + 8r

Solving
-10 + -2r = -20 + 8r

Solving for variable 'r'.

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

Add '-8r' to each side of the equation.
-10 + -2r + -8r = -20 + 8r + -8r

Combine like terms: -2r + -8r = -10r
-10 + -10r = -20 + 8r + -8r

Combine like terms: 8r + -8r = 0
-10 + -10r = -20 + 0
-10 + -10r = -20

Add '10' to each side of the equation.
-10 + 10 + -10r = -20 + 10

Combine like terms: -10 + 10 = 0
0 + -10r = -20 + 10
-10r = -20 + 10

Combine like terms: -20 + 10 = -10
-10r = -10

Divide each side by '-10'.
r = 1

Simplifying
r = 1

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