(31/4)(21/2)=

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Solution for (31/4)(21/2)= equation:


(3 1/4)(2 1/2)=0

We simplify the equation to the form, which is simple to understand 
(31/4)*(21/2)=0

Reorder the terms in parentheses
multiplication of parentheses
(+81.375)=0



Remove unnecessary parentheses
+81.375=0

We move all terms containing  to the left and all other terms to the right. 
0=0-81.375

We simplify left and right side of the equation. 
0=-81.375

0=-81.375

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

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