28-r=18

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Solution for 28-r=18 equation:


Simplifying
28 + -1r = 18

Solving
28 + -1r = 18

Solving for variable 'r'.

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

Add '-28' to each side of the equation.
28 + -28 + -1r = 18 + -28

Combine like terms: 28 + -28 = 0
0 + -1r = 18 + -28
-1r = 18 + -28

Combine like terms: 18 + -28 = -10
-1r = -10

Divide each side by '-1'.
r = 10

Simplifying
r = 10

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