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by dmitrijs

Tue Sep 22, 2009 11:12 am
Forum: Problem Solving
Topic: difference in the two?
Replies: 2
Views: 1205

difference in the two?

ricky is now twice is old as he was 8 years ago: R = 2(R-8)

pic frame M is $10 less than 3 times the cost of pic frame N: M=3N-10

why is the first one with parenthesis, and second one without?

by dmitrijs

Tue Sep 22, 2009 7:05 am
Forum: Problem Solving
Topic: difference in the two?
Replies: 2
Views: 1205