-1+r=-3

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Solution for -1+r=-3 equation: 


Simplifying
-1 + r = -3

Solving
-1 + r = -3

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 + r = -3 + 1

Combine like terms: -1 + 1 = 0
0 + r = -3 + 1
r = -3 + 1

Combine like terms: -3 + 1 = -2
r = -2

Simplifying
r = -2

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