4.2=-7x+21.7

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Solution for 4.2=-7x+21.7 equation: 



4.2=-7x+21.7

We move all terms to the left:

4.2-(-7x+21.7)=0

We get rid of parentheses

7x-21.7+4.2=0

We add all the numbers together, and all the variables

7x-17.5=0

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

7x=17.5

x=17.5/7

x=2+2.3333333333333/4.6666666666667

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