21/2x-7=13

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Solution for 21/2x-7=13 equation: 



21/2x-7=13

We move all terms to the left:

21/2x-7-(13)=0



Domain of the equation: 2x!=0

x!=0/2

x!=0

x∈R



We add all the numbers together, and all the variables

21/2x-20=0

We multiply all the terms by the denominator


-20*2x+21=0

Wy multiply elements

-40x+21=0

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

-40x=-21

x=-21/-40

x=21/40

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