r-(-18)=23

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Solution for r-(-18)=23 equation: 


Simplifying
r + -1(-18) = 23

Multiply -1 * -18
r + 18 = 23

Reorder the terms:
18 + r = 23

Solving
18 + r = 23

Solving for variable 'r'.

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

Add '-18' to each side of the equation.
18 + -18 + r = 23 + -18

Combine like terms: 18 + -18 = 0
0 + r = 23 + -18
r = 23 + -18

Combine like terms: 23 + -18 = 5
r = 5

Simplifying
r = 5

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