-2(1+6r)=20-r

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Solution for -2(1+6r)=20-r equation:


Simplifying
-2(1 + 6r) = 20 + -1r
(1 * -2 + 6r * -2) = 20 + -1r
(-2 + -12r) = 20 + -1r

Solving
-2 + -12r = 20 + -1r

Solving for variable 'r'.

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

Add 'r' to each side of the equation.
-2 + -12r + r = 20 + -1r + r

Combine like terms: -12r + r = -11r
-2 + -11r = 20 + -1r + r

Combine like terms: -1r + r = 0
-2 + -11r = 20 + 0
-2 + -11r = 20

Add '2' to each side of the equation.
-2 + 2 + -11r = 20 + 2

Combine like terms: -2 + 2 = 0
0 + -11r = 20 + 2
-11r = 20 + 2

Combine like terms: 20 + 2 = 22
-11r = 22

Divide each side by '-11'.
r = -2

Simplifying
r = -2

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