1/3x+7=4.2

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Solution for 1/3x+7=4.2 equation: 



1/3x+7=4.2

We move all terms to the left:

1/3x+7-(4.2)=0



Domain of the equation: 3x!=0

x!=0/3

x!=0

x∈R



We add all the numbers together, and all the variables

1/3x+2.8=0

We multiply all the terms by the denominator


(2.8)*3x+1=0

We multiply parentheses

8.4x+1=0

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

8.4x=-1

x=-1/8.4

x=-1/8.4

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