-3+r=15-r

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Solution for -3+r=15-r equation:


Simplifying
-3 + r = 15 + -1r

Solving
-3 + r = 15 + -1r

Solving for variable 'r'.

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

Add 'r' to each side of the equation.
-3 + r + r = 15 + -1r + r

Combine like terms: r + r = 2r
-3 + 2r = 15 + -1r + r

Combine like terms: -1r + r = 0
-3 + 2r = 15 + 0
-3 + 2r = 15

Add '3' to each side of the equation.
-3 + 3 + 2r = 15 + 3

Combine like terms: -3 + 3 = 0
0 + 2r = 15 + 3
2r = 15 + 3

Combine like terms: 15 + 3 = 18
2r = 18

Divide each side by '2'.
r = 9

Simplifying
r = 9

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