21=9-4/3

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Solution for 21=9-4/3 equation:


21=9-4/3

We simplify the equation to the form, which is simple to understand 
21=9-4/3

Simplifying:
21=9-1.33333333333

We move all terms containing  to the left and all other terms to the right. 
0=+9-1.33333333333-21

We simplify left and right side of the equation. 
0=-13.3333333333

0=-13.3333333333

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

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