-13=7r+(-55)

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Solution for -13=7r+(-55) equation: 


Simplifying
-13 = 7r + (-55)
-13 = 7r + -55

Reorder the terms:
-13 = -55 + 7r

Solving
-13 = -55 + 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.
-13 + -7r = -55 + 7r + -7r

Combine like terms: 7r + -7r = 0
-13 + -7r = -55 + 0
-13 + -7r = -55

Add '13' to each side of the equation.
-13 + 13 + -7r = -55 + 13

Combine like terms: -13 + 13 = 0
0 + -7r = -55 + 13
-7r = -55 + 13

Combine like terms: -55 + 13 = -42
-7r = -42

Divide each side by '-7'.
r = 6

Simplifying
r = 6

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