1/7x+3/7x+15=21

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Solution for 1/7x+3/7x+15=21 equation: 



1/7x+3/7x+15=21

We move all terms to the left:

1/7x+3/7x+15-(21)=0



Domain of the equation: 7x!=0

x!=0/7

x!=0

x∈R



We add all the numbers together, and all the variables

1/7x+3/7x-6=0

We multiply all the terms by the denominator


-6*7x+1+3=0

We add all the numbers together, and all the variables

-6*7x+4=0

Wy multiply elements

-42x+4=0

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

-42x=-4

x=-4/-42

x=2/21

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