3-r=5

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Solution for 3-r=5 equation: 


Simplifying
3 + -1r = 5

Solving
3 + -1r = 5

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 + -1r = 5 + -3

Combine like terms: 3 + -3 = 0
0 + -1r = 5 + -3
-1r = 5 + -3

Combine like terms: 5 + -3 = 2
-1r = 2

Divide each side by '-1'.
r = -2

Simplifying
r = -2

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