15-(-3)-20=

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Solution for 15-(-3)-20= equation: 


Simplifying
15 + -1(-3) + -20 = 0

Multiply -1 * -3
15 + 3 + -20 = 0

Combine like terms: 15 + 3 = 18
18 + -20 = 0

Combine like terms: 18 + -20 = -2
-2 = 0

Solving
-2 = 0

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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