r+3=(-1)

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Solution for r+3=(-1) equation: 


Simplifying
r + 3 = (-1)

Reorder the terms:
3 + r = (-1)
3 + r = -1

Solving
3 + r = -1

Solving for variable 'r'.

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

Add '-3' to each side of the equation.
3 + -3 + r = -1 + -3

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

Combine like terms: -1 + -3 = -4
r = -4

Simplifying
r = -4

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