5(-3-1)=20

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Solution for 5(-3-1)=20 equation: 


Simplifying
5(-3 + -1) = 20

Combine like terms: -3 + -1 = -4
5(-4) = 20

Multiply 5 * -4
-20 = 20

Solving
-20 = 20

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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