-7r-1=-78

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Solution for -7r-1=-78 equation: 


Simplifying
-7r + -1 = -78

Reorder the terms:
-1 + -7r = -78

Solving
-1 + -7r = -78

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 + -7r = -78 + 1

Combine like terms: -1 + 1 = 0
0 + -7r = -78 + 1
-7r = -78 + 1

Combine like terms: -78 + 1 = -77
-7r = -77

Divide each side by '-7'.
r = 11

Simplifying
r = 11

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