7+r+r+9=

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


Simplifying
7 + r + r + 9 = 0

Reorder the terms:
7 + 9 + r + r = 0

Combine like terms: 7 + 9 = 16
16 + r + r = 0

Combine like terms: r + r = 2r
16 + 2r = 0

Solving
16 + 2r = 0

Solving for variable 'r'.

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

Add '-16' to each side of the equation.
16 + -16 + 2r = 0 + -16

Combine like terms: 16 + -16 = 0
0 + 2r = 0 + -16
2r = 0 + -16

Combine like terms: 0 + -16 = -16
2r = -16

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

Simplifying
r = -8

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