Ex 3 age word problem | Linear equations | Algebra I | Khan Academy

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William is 4 times as old as Ben. 12 years ago, William was 7 times as old as Ben. How old is Ben now?

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When I look at this kinds of problems, I cry

godwin
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Wasn't expecting William to be that old lol.

CoolsBreeze
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Thumbs up, if you couldn't solve it so that others don't feel lonely.

soulreaperichig
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Math requires concentration and time. The only way to speed up calculations is with practice. Just try to focus and use reasoning and what you know to work your way through the problem. What helps me is sketch what i know and just jot down possible ways of solving the problem. Works for homework but on tests like i said you will need to practice to solve in a limited amount of time. Taking honors classes helps challenge, well forces you, to do tasks faster which in my opinion is very helpful

islulison
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Greatness of genious lies in simplicity...

manisharma
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hi dear, I am bit confused where question say, William is 7 times old as Ben.so why we multiply 7 with ben age?

sahibryan
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bro. this video is uneffective. it gave me anxiety more than it did help.

idc
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Still confused but my equation was close to his equation

fiona
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How come I cant answer any of the math problems? I cant get hints, cant submit, cant do anything when It comes to applying my math on the website. I cant watch videos but not practice.
HELP!!!

acetw
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Oops. I thought "12 years ago William was 7 times as old as Ben" meant "7 times as old as Ben was 12 years ago!!

cristianfcao
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wouldnt this tell us how old ben was 12 years ago? 

kevininalu
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I was talking literally. As in the website was broken...

acetw
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Who else set up a system of equations with "w=4b and w=7b-12" which results in w=16 and b=4?

matthewgillespie