-400=-8(r-8)

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Solution for -400=-8(r-8) equation:


Simplifying
-400 = -8(r + -8)

Reorder the terms:
-400 = -8(-8 + r)
-400 = (-8 * -8 + r * -8)
-400 = (64 + -8r)

Solving
-400 = 64 + -8r

Solving for variable 'r'.

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

Add '8r' to each side of the equation.
-400 + 8r = 64 + -8r + 8r

Combine like terms: -8r + 8r = 0
-400 + 8r = 64 + 0
-400 + 8r = 64

Add '400' to each side of the equation.
-400 + 400 + 8r = 64 + 400

Combine like terms: -400 + 400 = 0
0 + 8r = 64 + 400
8r = 64 + 400

Combine like terms: 64 + 400 = 464
8r = 464

Divide each side by '8'.
r = 58

Simplifying
r = 58

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