-2r+7+4r=15

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Solution for -2r+7+4r=15 equation: 


Simplifying
-2r + 7 + 4r = 15

Reorder the terms:
7 + -2r + 4r = 15

Combine like terms: -2r + 4r = 2r
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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