4+2+-21=

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Solution for 4+2+-21= equation: 


Simplifying
4 + 2 + -21 = 0

Combine like terms: 4 + 2 = 6
6 + -21 = 0

Combine like terms: 6 + -21 = -15
-15 = 0

Solving
-15 = 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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