ybingham Posts: 4, Reputation: 1 New Member #1 Oct 9, 2007, 12:18 PM
algebra word
Bjørn is 3 years older than Icar was 5 years ago. If the sum of their ages now is 66, how is each person?
 sGt HarDKorE Posts: 656, Reputation: 98 Senior Member #2 Oct 9, 2007, 12:30 PM
You use process of substitution so you need two equations:

1.)x+y=66

2.) Bjorn(x)=(y-5)+3 (Icar represents y, and Bjørn represents x if you didn't catch that.)

Plug (y-5)+3 in for X:
((y-5)+3)+y=66
y-5+3+y=66
y-2+y=66
2y-2=66
2y=68
y=34

Plug 34 for in for Y to get X:
(34-5)+3=32

Icar is 34
Bjørn is 32

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