How do you combine $(3-r) + (4+5r) + (2r-1)$ ?

Question

1526 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2015-04-28T20:11:28

The answer is $6r+6$ .

$(3-r)+(4+5r)+(2r-1)$

Do what's in each set of parentheses first.

$3-r+4+5r+2r-1$ =

Combine like terms and add or subtract from left to right.

$-r+5r+2r+3+4-1$ =

$6r+6$

How do you combine (3-r) + (4+5r) + (2r-1)(3-r) + (4+5r) + (2r-1)?