21000000000000-7000000000=

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Solution for 21000000000000-7000000000= equation:


21000000000000-7000000000=0

We simplify the equation to the form, which is simple to understand 
21000000000000-7000000000=0

We move all terms containing  to the left and all other terms to the right. 
0=0-21000000000000+7000000000

We simplify left and right side of the equation. 
0=-20993000000000

0=-20993000000000

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

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