here is the question. please no answers! i just need a push in the right direction by telling me how to begin to set it up so I can find the answer myself. Thanks.
One number is 12 more than another. The sum of the smaller number and twice the larger number is 39. Find the larger number.
2006-06-23 14:16:22 · 11 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
x=y+12
x+2y=39
2006-06-23 14:20:02 · answer #1 · answered by Anonymous · 0⤊ 0⤋
One-variable algebra.
Let x = smaller number
The other number is 12 more than the smaller number. What is the algebraic expression for this? x + 12
The sum of the smaller number and twice the larger number is 39. The expression for this statement is: x + 2(x + 12) = 39
Solve for x.
2006-06-23 22:30:29 · answer #2 · answered by jimbob 6 · 0⤊ 0⤋
best way is to break up the questions and change the wording to math symbols:
one number is 12 more than another: y = x + 12
the sum of the smaller number and twice the larger number is 39:
x + 2y = 39
y = x + 12 and
x + 2y = 39
Solve for x and y; y is the larger number.
2006-06-23 22:39:11 · answer #3 · answered by Anonymous · 0⤊ 0⤋
X + 2(X+12) = 39
2006-06-23 22:08:44 · answer #4 · answered by davidosterberg1 6 · 0⤊ 0⤋
okay
usually you start by naming the things you want to find out
s = another number, the smaller one
L = one number, the larger one
now we look at the different sentences that tell us something
one number is 12 more than another ,
what do you think maybe L (one number) = s (another) +12
the next sentence is
the sum of the smaller number and twice the larger is 39
okay s (the smaller number) and 2L (twide the larger) = 39
what do you think? sound right?
L=s+12
s+2L=39
a little arranging, a little solving and you are there
go for it
math skills will improve your life
2006-06-23 21:23:39 · answer #5 · answered by enginerd 6 · 0⤊ 0⤋
Use the given information to set up two equations involving the smaller number X and the larger number Y. Then solve for the larger number.
2006-06-23 21:20:31 · answer #6 · answered by fcas80 7 · 0⤊ 0⤋
a= larger number
b = smaller number
a = b + 12
b + 2a = 39, which you can re-arrange using the first equation to:
2(b+12) + b = 39 or
2b + 24 + b = 39
You can now calculate b and plug that value into the first equation to find a, the larger number.
2006-06-23 21:22:22 · answer #7 · answered by DR 5 · 0⤊ 0⤋
i am happy you are not asking for answer..
this is one variable question..set up the equation..there will be just one equation..you can take smaller one as x and larger one will be x+12 then..
2006-06-23 21:20:04 · answer #8 · answered by Vivek 4 · 0⤊ 0⤋
s+12=L and s+2L=39
2006-06-23 21:55:19 · answer #9 · answered by bigdog2all2 1 · 0⤊ 0⤋
set "X" to the value of the smaller number,
more?
2006-06-23 21:19:58 · answer #10 · answered by The greatest and the best. 5 · 0⤊ 0⤋