3r-7=12+2r-8-1

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Solution for 3r-7=12+2r-8-1 equation: 


Simplifying
3r + -7 = 12 + 2r + -8 + -1

Reorder the terms:
-7 + 3r = 12 + 2r + -8 + -1

Reorder the terms:
-7 + 3r = 12 + -8 + -1 + 2r

Combine like terms: 12 + -8 = 4
-7 + 3r = 4 + -1 + 2r

Combine like terms: 4 + -1 = 3
-7 + 3r = 3 + 2r

Solving
-7 + 3r = 3 + 2r

Solving for variable 'r'.

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

Add '-2r' to each side of the equation.
-7 + 3r + -2r = 3 + 2r + -2r

Combine like terms: 3r + -2r = 1r
-7 + 1r = 3 + 2r + -2r

Combine like terms: 2r + -2r = 0
-7 + 1r = 3 + 0
-7 + 1r = 3

Add '7' to each side of the equation.
-7 + 7 + 1r = 3 + 7

Combine like terms: -7 + 7 = 0
0 + 1r = 3 + 7
1r = 3 + 7

Combine like terms: 3 + 7 = 10
1r = 10

Divide each side by '1'.
r = 10

Simplifying
r = 10

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