-r+3-r=15

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


Simplifying
-1r + 3 + -1r = 15

Reorder the terms:
3 + -1r + -1r = 15

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

Solving
3 + -2r = 15

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 + -2r = 15 + -3

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

Combine like terms: 15 + -3 = 12
-2r = 12

Divide each side by '-2'.
r = -6

Simplifying
r = -6

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