Homework Help: Math

Posted by CJ on Saturday, October 27, 2012 at 1:58pm.

1)one number is four more than a second number. Twice the second is three more than the first. Find the numbers.

2)four times one number minus a second is 11, and the sum of the numbers is 14. Find the numbers.

Math - Reiny, Saturday, October 27, 2012 at 2:25pm
let one number (the first ) be x
let the second number by y

Just translate the English into Math , after all Math is just a language
"one number is four more than a second number" ---> x = y+4

"Twice the second is three more than the first" ---> 2y = x+3

so lining them up
x - y = 4
x - 2y = -3
subtract:
y = 7
then from x = y+7
x = 11

The first number is 11, the second is 7

check:
is 11 four more than 7 ? YES
is twice 14 three more than 11 ? YES
I am right!!!

Try the second the same way, show me your work

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