2r+9=-7r

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Solution for 2r+9=-7r equation:


Simplifying
2r + 9 = -7r

Reorder the terms:
9 + 2r = -7r

Solving
9 + 2r = -7r

Solving for variable 'r'.

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

Add '7r' to each side of the equation.
9 + 2r + 7r = -7r + 7r

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

Combine like terms: -7r + 7r = 0
9 + 9r = 0

Add '-9' to each side of the equation.
9 + -9 + 9r = 0 + -9

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

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

Divide each side by '9'.
r = -1

Simplifying
r = -1

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