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Sorry for asking so many questions but I don't understand this problem? 10 points?

0 votes
It's probably the same strategy as I've been doing but idk how to do it
4(r + 2) + 5r = 26
Is it like this?
4r + 8 + 5r = 26
9r + 8 = 26
And If that's right where do I go from there?
Thanks so much and 10 points and an ice cream cone J
asked Mar 1, 2013 in PRE-ALGEBRA by homeworkhelp Mentor

1 Answer

+1 vote

 

9r + 8 = 26
Subtraction property of equality: if a = b then a - c = b - c
subtract 8 from each side
9r + 8 -8 = 26 -8
9r = 18

Division property of equality: if a = b then a / c = b / c ( c not equal to zero)

divide each side by 9
r = 18/9 = 2

answered Mar 1, 2013 by John Lyn Pupil

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