80=8(7r-4)

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Solution for 80=8(7r-4) equation:


Simplifying
80 = 8(7r + -4)

Reorder the terms:
80 = 8(-4 + 7r)
80 = (-4 * 8 + 7r * 8)
80 = (-32 + 56r)

Solving
80 = -32 + 56r

Solving for variable 'r'.

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

Add '-56r' to each side of the equation.
80 + -56r = -32 + 56r + -56r

Combine like terms: 56r + -56r = 0
80 + -56r = -32 + 0
80 + -56r = -32

Add '-80' to each side of the equation.
80 + -80 + -56r = -32 + -80

Combine like terms: 80 + -80 = 0
0 + -56r = -32 + -80
-56r = -32 + -80

Combine like terms: -32 + -80 = -112
-56r = -112

Divide each side by '-56'.
r = 2

Simplifying
r = 2

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