-12=3(5-r)

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Solution for -12=3(5-r) equation:


Simplifying
-12 = 3(5 + -1r)
-12 = (5 * 3 + -1r * 3)
-12 = (15 + -3r)

Solving
-12 = 15 + -3r

Solving for variable 'r'.

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

Add '3r' to each side of the equation.
-12 + 3r = 15 + -3r + 3r

Combine like terms: -3r + 3r = 0
-12 + 3r = 15 + 0
-12 + 3r = 15

Add '12' to each side of the equation.
-12 + 12 + 3r = 15 + 12

Combine like terms: -12 + 12 = 0
0 + 3r = 15 + 12
3r = 15 + 12

Combine like terms: 15 + 12 = 27
3r = 27

Divide each side by '3'.
r = 9

Simplifying
r = 9

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