15=7+2(x-1)

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Solution for 15=7+2(x-1) equation: 



15=7+2(x-1)

We move all terms to the left:

15-(7+2(x-1))=0



We calculate terms in parentheses: -(7+2(x-1)), so:

7+2(x-1)

determiningTheFunctionDomain
2(x-1)+7

We multiply parentheses

2x-2+7

We add all the numbers together, and all the variables

2x+5

Back to the equation:

-(2x+5)



We get rid of parentheses

-2x-5+15=0

We add all the numbers together, and all the variables

-2x+10=0

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

-2x=-10

x=-10/-2

x=+5

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