2r-9=7+10r

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Solution for 2r-9=7+10r equation:


Simplifying
2r + -9 = 7 + 10r

Reorder the terms:
-9 + 2r = 7 + 10r

Solving
-9 + 2r = 7 + 10r

Solving for variable 'r'.

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

Add '-10r' to each side of the equation.
-9 + 2r + -10r = 7 + 10r + -10r

Combine like terms: 2r + -10r = -8r
-9 + -8r = 7 + 10r + -10r

Combine like terms: 10r + -10r = 0
-9 + -8r = 7 + 0
-9 + -8r = 7

Add '9' to each side of the equation.
-9 + 9 + -8r = 7 + 9

Combine like terms: -9 + 9 = 0
0 + -8r = 7 + 9
-8r = 7 + 9

Combine like terms: 7 + 9 = 16
-8r = 16

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

Simplifying
r = -2

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