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Solving equation for x: 2(x + 4) = ax  TOPIC_SOLVED

I am stumped by a very simple equation that I am trying to solve for x. 2(x + 4) = ax. I know the answer is supposed to be x = 8/(a - 2), but I can't see how to get there. I first cleared the parentheses: 2x + 8 = ax. Then: 2x = ax - 8; which leads to x = ax/2 - 4. But I can't seem to clear that rig...
by Leonardo of Pisa
on Sun Sep 12, 2010 7:41 am
 
Forum: Pre-Algebra
Topic: Solving equation for x: 2(x + 4) = ax
Replies: 2
Views: 1919

Re: Solving equation for x: 2(x + 4) = ax  TOPIC_SOLVED

G'day Little Dragon, Very many thanks for pointing me to the "little trick". I had had a brief look at that page earlier, but hadn't read all the way down before deciding it was irrelevant. Careless! Must be more careful about that in the future. I was glad to discover it was a "trick...
by Leonardo of Pisa
on Sun Sep 12, 2010 5:20 pm
 
Forum: Pre-Algebra
Topic: Solving equation for x: 2(x + 4) = ax
Replies: 2
Views: 1919

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