3=4x/10

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Solution for 3=4x/10 equation: 



3=4x/10

We move all terms to the left:

3-(4x/10)=0

We add all the numbers together, and all the variables

-(+4x/10)+3=0

We get rid of parentheses

-4x/10+3=0

We multiply all the terms by the denominator


-4x+3*10=0

We add all the numbers together, and all the variables

-4x+30=0

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

-4x=-30

x=-30/-4

x=7+1/2

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