15+7r=-8(r-8)-4

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Solution for 15+7r=-8(r-8)-4 equation: 


Simplifying
15 + 7r = -8(r + -8) + -4

Reorder the terms:
15 + 7r = -8(-8 + r) + -4
15 + 7r = (-8 * -8 + r * -8) + -4
15 + 7r = (64 + -8r) + -4

Reorder the terms:
15 + 7r = 64 + -4 + -8r

Combine like terms: 64 + -4 = 60
15 + 7r = 60 + -8r

Solving
15 + 7r = 60 + -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.
15 + 7r + 8r = 60 + -8r + 8r

Combine like terms: 7r + 8r = 15r
15 + 15r = 60 + -8r + 8r

Combine like terms: -8r + 8r = 0
15 + 15r = 60 + 0
15 + 15r = 60

Add '-15' to each side of the equation.
15 + -15 + 15r = 60 + -15

Combine like terms: 15 + -15 = 0
0 + 15r = 60 + -15
15r = 60 + -15

Combine like terms: 60 + -15 = 45
15r = 45

Divide each side by '15'.
r = 3

Simplifying
r = 3

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