4-r=-18

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Solution for 4-r=-18 equation: 


Simplifying
4 + -1r = -18

Solving
4 + -1r = -18

Solving for variable 'r'.

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

Add '-4' to each side of the equation.
4 + -4 + -1r = -18 + -4

Combine like terms: 4 + -4 = 0
0 + -1r = -18 + -4
-1r = -18 + -4

Combine like terms: -18 + -4 = -22
-1r = -22

Divide each side by '-1'.
r = 22

Simplifying
r = 22

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