4+2r=2(r-1)+r

Solution for 4+2r=2(r-1)+r equation:

4+2r=2(r-1)+r

We move all terms to the left:

4+2r-(2(r-1)+r)=0


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

2(r-1)+r

We add all the numbers together, and all the variables

r+2(r-1)

We multiply parentheses

r+2r-2

We add all the numbers together, and all the variables

3r-2

Back to the equation:

-(3r-2)


We get rid of parentheses

2r-3r+2+4=0

We add all the numbers together, and all the variables

-1r+6=0

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

-r=-6

r=-6/-1

r=+6