-2+2(-8+8r)=4r+30

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Solution for -2+2(-8+8r)=4r+30 equation:


Simplifying
-2 + 2(-8 + 8r) = 4r + 30
-2 + (-8 * 2 + 8r * 2) = 4r + 30
-2 + (-16 + 16r) = 4r + 30

Combine like terms: -2 + -16 = -18
-18 + 16r = 4r + 30

Reorder the terms:
-18 + 16r = 30 + 4r

Solving
-18 + 16r = 30 + 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.
-18 + 16r + -4r = 30 + 4r + -4r

Combine like terms: 16r + -4r = 12r
-18 + 12r = 30 + 4r + -4r

Combine like terms: 4r + -4r = 0
-18 + 12r = 30 + 0
-18 + 12r = 30

Add '18' to each side of the equation.
-18 + 18 + 12r = 30 + 18

Combine like terms: -18 + 18 = 0
0 + 12r = 30 + 18
12r = 30 + 18

Combine like terms: 30 + 18 = 48
12r = 48

Divide each side by '12'.
r = 4

Simplifying
r = 4

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