6-2(8-2r)=20

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Solution for 6-2(8-2r)=20 equation:


Simplifying
6 + -2(8 + -2r) = 20
6 + (8 * -2 + -2r * -2) = 20
6 + (-16 + 4r) = 20

Combine like terms: 6 + -16 = -10
-10 + 4r = 20

Solving
-10 + 4r = 20

Solving for variable 'r'.

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

Add '10' to each side of the equation.
-10 + 10 + 4r = 20 + 10

Combine like terms: -10 + 10 = 0
0 + 4r = 20 + 10
4r = 20 + 10

Combine like terms: 20 + 10 = 30
4r = 30

Divide each side by '4'.
r = 7.5

Simplifying
r = 7.5

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