9r+1-7r=-15

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


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

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

Combine like terms: 9r + -7r = 2r
1 + 2r = -15

Solving
1 + 2r = -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 + 2r = -15 + -1

Combine like terms: 1 + -1 = 0
0 + 2r = -15 + -1
2r = -15 + -1

Combine like terms: -15 + -1 = -16
2r = -16

Divide each side by '2'.
r = -8

Simplifying
r = -8

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