21+5x=3(x+5)

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



21+5x=3(x+5)

We move all terms to the left:

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



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

3(x+5)

We multiply parentheses

3x+15

Back to the equation:

-(3x+15)



We get rid of parentheses

5x-3x-15+21=0

We add all the numbers together, and all the variables

2x+6=0

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

2x=-6

x=-6/2

x=-3

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