21=6-2.2x-2.7x

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Solution for 21=6-2.2x-2.7x equation: 



21=6-2.2x-2.7x

We move all terms to the left:

21-(6-2.2x-2.7x)=0

We add all the numbers together, and all the variables

-(-4.9x+6)+21=0

We get rid of parentheses

4.9x-6+21=0

We add all the numbers together, and all the variables

4.9x+15=0

We move all terms containing x to the left, all other terms to the right

4.9x=-15

x=-15/4.9

x=-3+0.3/4.9

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