-7=4-2r

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Solution for -7=4-2r equation: 



-7=4-2r

We move all terms to the left:

-7-(4-2r)=0

We add all the numbers together, and all the variables

-(-2r+4)-7=0

We get rid of parentheses

2r-4-7=0

We add all the numbers together, and all the variables

2r-11=0

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

2r=11

r=11/2

r=5+1/2

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