20.4-(12.9)=

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Solution for 20.4-(12.9)= equation:


20.4-(12.9)=0

We simplify the equation to the form, which is simple to understand 
20.4-(12.9)=0

Remove unnecessary parentheses
20.4-12.9=0

We move all terms containing  to the left and all other terms to the right. 
0=0-20.4+12.9

We simplify left and right side of the equation. 
0=-7.5

0=-7.5

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

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