70+1r-79-10r=9

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Solution for 70+1r-79-10r=9 equation:


Simplifying
70 + 1r + -79 + -10r = 9

Reorder the terms:
70 + -79 + 1r + -10r = 9

Combine like terms: 70 + -79 = -9
-9 + 1r + -10r = 9

Combine like terms: 1r + -10r = -9r
-9 + -9r = 9

Solving
-9 + -9r = 9

Solving for variable 'r'.

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

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

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

Combine like terms: 9 + 9 = 18
-9r = 18

Divide each side by '-9'.
r = -2

Simplifying
r = -2

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