10r+12-11r=3r-12-12

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Solution for 10r+12-11r=3r-12-12 equation:


Simplifying
10r + 12 + -11r = 3r + -12 + -12

Reorder the terms:
12 + 10r + -11r = 3r + -12 + -12

Combine like terms: 10r + -11r = -1r
12 + -1r = 3r + -12 + -12

Reorder the terms:
12 + -1r = -12 + -12 + 3r

Combine like terms: -12 + -12 = -24
12 + -1r = -24 + 3r

Solving
12 + -1r = -24 + 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 + -1r + -3r = -24 + 3r + -3r

Combine like terms: -1r + -3r = -4r
12 + -4r = -24 + 3r + -3r

Combine like terms: 3r + -3r = 0
12 + -4r = -24 + 0
12 + -4r = -24

Add '-12' to each side of the equation.
12 + -12 + -4r = -24 + -12

Combine like terms: 12 + -12 = 0
0 + -4r = -24 + -12
-4r = -24 + -12

Combine like terms: -24 + -12 = -36
-4r = -36

Divide each side by '-4'.
r = 9

Simplifying
r = 9

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