9=4.2x-7

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Solution for 9=4.2x-7 equation: 



9=4.2x-7

We move all terms to the left:

9-(4.2x-7)=0

We get rid of parentheses

-4.2x+7+9=0

We add all the numbers together, and all the variables

-4.2x+16=0

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

-4.2x=-16

x=-16/-4.2

x=3+2.4285714285714/3

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