3*7+5*(-4)=

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Solution for 3*7+5*(-4)= equation:


3*7+5*(-4)=0

We simplify the equation to the form, which is simple to understand 
3*7+5*(-4)=0

Simplifying:
+21+5*(-4)=0

Reorder the terms in parentheses
+21+(-20)=0

Remove unnecessary parentheses
+21-20=0

We move all terms containing  to the left and all other terms to the right. 
0=0-21+20

We simplify left and right side of the equation. 
0=-1

0=-1

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

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