-1=1-r-7

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


Simplifying
-1 = 1 + -1r + -7

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

Combine like terms: 1 + -7 = -6
-1 = -6 + -1r

Solving
-1 = -6 + -1r

Solving for variable 'r'.

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

Add 'r' to each side of the equation.
-1 + r = -6 + -1r + r

Combine like terms: -1r + r = 0
-1 + r = -6 + 0
-1 + r = -6

Add '1' to each side of the equation.
-1 + 1 + r = -6 + 1

Combine like terms: -1 + 1 = 0
0 + r = -6 + 1
r = -6 + 1

Combine like terms: -6 + 1 = -5
r = -5

Simplifying
r = -5

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