18=8-5r

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Solution for 18=8-5r equation: 


Simplifying
18 = 8 + -5r

Solving
18 = 8 + -5r

Solving for variable 'r'.

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

Add '5r' to each side of the equation.
18 + 5r = 8 + -5r + 5r

Combine like terms: -5r + 5r = 0
18 + 5r = 8 + 0
18 + 5r = 8

Add '-18' to each side of the equation.
18 + -18 + 5r = 8 + -18

Combine like terms: 18 + -18 = 0
0 + 5r = 8 + -18
5r = 8 + -18

Combine like terms: 8 + -18 = -10
5r = -10

Divide each side by '5'.
r = -2

Simplifying
r = -2

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