8r-20=-(-2r-4)

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Solution for 8r-20=-(-2r-4) equation:


Simplifying
8r + -20 = -1(-2r + -4)

Reorder the terms:
-20 + 8r = -1(-2r + -4)

Reorder the terms:
-20 + 8r = -1(-4 + -2r)
-20 + 8r = (-4 * -1 + -2r * -1)
-20 + 8r = (4 + 2r)

Solving
-20 + 8r = 4 + 2r

Solving for variable 'r'.

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

Add '-2r' to each side of the equation.
-20 + 8r + -2r = 4 + 2r + -2r

Combine like terms: 8r + -2r = 6r
-20 + 6r = 4 + 2r + -2r

Combine like terms: 2r + -2r = 0
-20 + 6r = 4 + 0
-20 + 6r = 4

Add '20' to each side of the equation.
-20 + 20 + 6r = 4 + 20

Combine like terms: -20 + 20 = 0
0 + 6r = 4 + 20
6r = 4 + 20

Combine like terms: 4 + 20 = 24
6r = 24

Divide each side by '6'.
r = 4

Simplifying
r = 4

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