5x-21=7(x-5)

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Solution for 5x-21=7(x-5) equation: 



5x-21=7(x-5)

We move all terms to the left:

5x-21-(7(x-5))=0



We calculate terms in parentheses: -(7(x-5)), so:

7(x-5)

We multiply parentheses

7x-35

Back to the equation:

-(7x-35)



We get rid of parentheses

5x-7x+35-21=0

We add all the numbers together, and all the variables

-2x+14=0

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

-2x=-14

x=-14/-2

x=+7

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