8=11-r

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Solution for 8=11-r equation: 


Simplifying
8 = 11 + -1r

Solving
8 = 11 + -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.
8 + r = 11 + -1r + r

Combine like terms: -1r + r = 0
8 + r = 11 + 0
8 + r = 11

Add '-8' to each side of the equation.
8 + -8 + r = 11 + -8

Combine like terms: 8 + -8 = 0
0 + r = 11 + -8
r = 11 + -8

Combine like terms: 11 + -8 = 3
r = 3

Simplifying
r = 3

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