7r-1+9r=-15

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Solution for 7r-1+9r=-15 equation:


Simplifying
7r + -1 + 9r = -15

Reorder the terms:
-1 + 7r + 9r = -15

Combine like terms: 7r + 9r = 16r
-1 + 16r = -15

Solving
-1 + 16r = -15

Solving for variable 'r'.

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

Add '1' to each side of the equation.
-1 + 1 + 16r = -15 + 1

Combine like terms: -1 + 1 = 0
0 + 16r = -15 + 1
16r = -15 + 1

Combine like terms: -15 + 1 = -14
16r = -14

Divide each side by '16'.
r = -0.875

Simplifying
r = -0.875

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