-12+7+(-21)-4=

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Solution for -12+7+(-21)-4= equation: 


Simplifying
-12 + 7 + (-21) + -4 = 0
-12 + 7 + -21 + -4 = 0

Combine like terms: -12 + 7 = -5
-5 + -21 + -4 = 0

Combine like terms: -5 + -21 = -26
-26 + -4 = 0

Combine like terms: -26 + -4 = -30
-30 = 0

Solving
-30 = 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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