4r+8+7-6r=-9

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Solution for 4r+8+7-6r=-9 equation:


Simplifying
4r + 8 + 7 + -6r = -9

Reorder the terms:
8 + 7 + 4r + -6r = -9

Combine like terms: 8 + 7 = 15
15 + 4r + -6r = -9

Combine like terms: 4r + -6r = -2r
15 + -2r = -9

Solving
15 + -2r = -9

Solving for variable 'r'.

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

Add '-15' to each side of the equation.
15 + -15 + -2r = -9 + -15

Combine like terms: 15 + -15 = 0
0 + -2r = -9 + -15
-2r = -9 + -15

Combine like terms: -9 + -15 = -24
-2r = -24

Divide each side by '-2'.
r = 12

Simplifying
r = 12

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