8(6+6r)-5(8+6r)=-28

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Solution for 8(6+6r)-5(8+6r)=-28 equation: 


Simplifying
8(6 + 6r) + -5(8 + 6r) = -28
(6 * 8 + 6r * 8) + -5(8 + 6r) = -28
(48 + 48r) + -5(8 + 6r) = -28
48 + 48r + (8 * -5 + 6r * -5) = -28
48 + 48r + (-40 + -30r) = -28

Reorder the terms:
48 + -40 + 48r + -30r = -28

Combine like terms: 48 + -40 = 8
8 + 48r + -30r = -28

Combine like terms: 48r + -30r = 18r
8 + 18r = -28

Solving
8 + 18r = -28

Solving for variable 'r'.

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

Add '-8' to each side of the equation.
8 + -8 + 18r = -28 + -8

Combine like terms: 8 + -8 = 0
0 + 18r = -28 + -8
18r = -28 + -8

Combine like terms: -28 + -8 = -36
18r = -36

Divide each side by '18'.
r = -2

Simplifying
r = -2

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