3-7r-5r=-9

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Solution for 3-7r-5r=-9 equation: 


Simplifying
3 + -7r + -5r = -9

Combine like terms: -7r + -5r = -12r
3 + -12r = -9

Solving
3 + -12r = -9

Solving for variable 'r'.

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

Add '-3' to each side of the equation.
3 + -3 + -12r = -9 + -3

Combine like terms: 3 + -3 = 0
0 + -12r = -9 + -3
-12r = -9 + -3

Combine like terms: -9 + -3 = -12
-12r = -12

Divide each side by '-12'.
r = 1

Simplifying
r = 1

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