-7(r-9)=2(12-5r)

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Solution for -7(r-9)=2(12-5r) equation:


Simplifying
-7(r + -9) = 2(12 + -5r)

Reorder the terms:
-7(-9 + r) = 2(12 + -5r)
(-9 * -7 + r * -7) = 2(12 + -5r)
(63 + -7r) = 2(12 + -5r)
63 + -7r = (12 * 2 + -5r * 2)
63 + -7r = (24 + -10r)

Solving
63 + -7r = 24 + -10r

Solving for variable 'r'.

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

Add '10r' to each side of the equation.
63 + -7r + 10r = 24 + -10r + 10r

Combine like terms: -7r + 10r = 3r
63 + 3r = 24 + -10r + 10r

Combine like terms: -10r + 10r = 0
63 + 3r = 24 + 0
63 + 3r = 24

Add '-63' to each side of the equation.
63 + -63 + 3r = 24 + -63

Combine like terms: 63 + -63 = 0
0 + 3r = 24 + -63
3r = 24 + -63

Combine like terms: 24 + -63 = -39
3r = -39

Divide each side by '3'.
r = -13

Simplifying
r = -13

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