3=(2x+21)/5

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Solution for 3=(2x+21)/5 equation: 



3=(2x+21)/5

We move all terms to the left:

3-((2x+21)/5)=0

We multiply all the terms by the denominator


-((2x+21)+3*5)=0



We calculate terms in parentheses: -((2x+21)+3*5), so:

(2x+21)+3*5

We add all the numbers together, and all the variables

(2x+21)+15

We get rid of parentheses

2x+21+15

We add all the numbers together, and all the variables

2x+36

Back to the equation:

-(2x+36)



We get rid of parentheses

-2x-36=0

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

-2x=36

x=36/-2

x=-18

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