-8(r+9)=-5(r+12)

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Solution for -8(r+9)=-5(r+12) equation:


Simplifying
-8(r + 9) = -5(r + 12)

Reorder the terms:
-8(9 + r) = -5(r + 12)
(9 * -8 + r * -8) = -5(r + 12)
(-72 + -8r) = -5(r + 12)

Reorder the terms:
-72 + -8r = -5(12 + r)
-72 + -8r = (12 * -5 + r * -5)
-72 + -8r = (-60 + -5r)

Solving
-72 + -8r = -60 + -5r

Solving for variable 'r'.

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

Add '5r' to each side of the equation.
-72 + -8r + 5r = -60 + -5r + 5r

Combine like terms: -8r + 5r = -3r
-72 + -3r = -60 + -5r + 5r

Combine like terms: -5r + 5r = 0
-72 + -3r = -60 + 0
-72 + -3r = -60

Add '72' to each side of the equation.
-72 + 72 + -3r = -60 + 72

Combine like terms: -72 + 72 = 0
0 + -3r = -60 + 72
-3r = -60 + 72

Combine like terms: -60 + 72 = 12
-3r = 12

Divide each side by '-3'.
r = -4

Simplifying
r = -4

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