8=-(2r-4)

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


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

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

Solving
8 = 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.
8 + 2r = 4 + -2r + 2r

Combine like terms: -2r + 2r = 0
8 + 2r = 4 + 0
8 + 2r = 4

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

Combine like terms: 8 + -8 = 0
0 + 2r = 4 + -8
2r = 4 + -8

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

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

Simplifying
r = -2

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