-0.4*21-2=

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Solution for -0.4*21-2= equation:


-0.4*21-2=0

We simplify the equation to the form, which is simple to understand 
-0.4*21-2=0

We move all terms containing  to the left and all other terms to the right. 
0=0+8.4+2

We simplify left and right side of the equation. 
0=+10.4

0=10.4

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

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