I usually start with the smallest quantity, which here is Carl's age
let Carl's age be x
then Bill is 2x
and Al is 4x
in 10 years:
Carl --- x+10
Bill --- 2x+10
Al ---- 4x + 10
so 4x+10 = 2(x+10)
4x + 10 = 2x + 20
2x = 10
x = 5
So now Al is 4(5) = 20
Carl -- 5
Bill --- 10
Al ---- 20
10 years from now:
Al will be 30 and Carl will be 15
Is Al twice as old as Carl ?? YES
Answer this Question
Math - 2x represents that Clyde is twice (2 times) as old as Bonnie. 6 years ...
math - i never can do word problems....please help... i got 7 of them.....these ...
math - A. Brad is 12 years older than Sam . If Brad were 8 years older than he ...
math - Jack is twice as old as he was 5 years ago. His mother was then six times...
9th grade math word problems - i never can do word problems....please help... i ...
Math - I don't get page 50 of algebra with pizzazz! Please help? 7) Kathy is 6 ...
math - L is 3 times as old as D, who is five yrs older than C. If in 18 years L ...
math word - beth is two years older than julio. gerald is twice as old as beth. ...
math - My mother and I are the same age – only the numbers are reversed (21,12 ...
grade 9 algerbra HELP!!!! PLZ!!! - betty is now three times as old as mike, but ...