-7-2r=4+9r

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Solution for -7-2r=4+9r equation:


Simplifying
-7 + -2r = 4 + 9r

Solving
-7 + -2r = 4 + 9r

Solving for variable 'r'.

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

Add '-9r' to each side of the equation.
-7 + -2r + -9r = 4 + 9r + -9r

Combine like terms: -2r + -9r = -11r
-7 + -11r = 4 + 9r + -9r

Combine like terms: 9r + -9r = 0
-7 + -11r = 4 + 0
-7 + -11r = 4

Add '7' to each side of the equation.
-7 + 7 + -11r = 4 + 7

Combine like terms: -7 + 7 = 0
0 + -11r = 4 + 7
-11r = 4 + 7

Combine like terms: 4 + 7 = 11
-11r = 11

Divide each side by '-11'.
r = -1

Simplifying
r = -1

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