30-2r=7

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Solution for 30-2r=7 equation: 


Simplifying
30 + -2r = 7

Solving
30 + -2r = 7

Solving for variable 'r'.

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

Add '-30' to each side of the equation.
30 + -30 + -2r = 7 + -30

Combine like terms: 30 + -30 = 0
0 + -2r = 7 + -30
-2r = 7 + -30

Combine like terms: 7 + -30 = -23
-2r = -23

Divide each side by '-2'.
r = 11.5

Simplifying
r = 11.5

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