7-2r=15

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Solution for 7-2r=15 equation: 


Simplifying
7 + -2r = 15

Solving
7 + -2r = 15

Solving for variable 'r'.

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

Add '-7' to each side of the equation.
7 + -7 + -2r = 15 + -7

Combine like terms: 7 + -7 = 0
0 + -2r = 15 + -7
-2r = 15 + -7

Combine like terms: 15 + -7 = 8
-2r = 8

Divide each side by '-2'.
r = -4

Simplifying
r = -4

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