-91=7(r-7)

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Solution for -91=7(r-7) equation:


Simplifying
-91 = 7(r + -7)

Reorder the terms:
-91 = 7(-7 + r)
-91 = (-7 * 7 + r * 7)
-91 = (-49 + 7r)

Solving
-91 = -49 + 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.
-91 + -7r = -49 + 7r + -7r

Combine like terms: 7r + -7r = 0
-91 + -7r = -49 + 0
-91 + -7r = -49

Add '91' to each side of the equation.
-91 + 91 + -7r = -49 + 91

Combine like terms: -91 + 91 = 0
0 + -7r = -49 + 91
-7r = -49 + 91

Combine like terms: -49 + 91 = 42
-7r = 42

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

Simplifying
r = -6

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