31-4r=-7(-4a+8)

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Solution for 31-4r=-7(-4a+8) equation: 


Simplifying
31 + -4r = -7(-4a + 8)

Reorder the terms:
31 + -4r = -7(8 + -4a)
31 + -4r = (8 * -7 + -4a * -7)
31 + -4r = (-56 + 28a)

Solving
31 + -4r = -56 + 28a

Solving for variable 'r'.

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

Add '-31' to each side of the equation.
31 + -31 + -4r = -56 + -31 + 28a

Combine like terms: 31 + -31 = 0
0 + -4r = -56 + -31 + 28a
-4r = -56 + -31 + 28a

Combine like terms: -56 + -31 = -87
-4r = -87 + 28a

Divide each side by '-4'.
r = 21.75 + -7a

Simplifying
r = 21.75 + -7a

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