7+2r=-1+2(1+2r)

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

7+2r=-1+2(1+2r)

We move all terms to the left:

7+2r-(-1+2(1+2r))=0

We add all the numbers together, and all the variables

2r-(-1+2(2r+1))+7=0


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

-1+2(2r+1)

determiningTheFunctionDomain
2(2r+1)-1

We multiply parentheses

4r+2-1

We add all the numbers together, and all the variables

4r+1

Back to the equation:

-(4r+1)


We get rid of parentheses

2r-4r-1+7=0

We add all the numbers together, and all the variables

-2r+6=0

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

-2r=-6

r=-6/-2

r=+3