What does x and y equal:
3x+5y=17
3x+2y=14
Please help homework needs to be in for 2morrow HELP ME!!!!!!!
2006-11-08 05:04:24 · 9 answers · asked by :) Anfield 2 in Education & Reference ➔ Homework Help
3x+5y=17..............equation no. (1)
3x+2y=14...............equation no. (2)
subtract (2) from (1)
3x+5y-3x-2y=17-14
3y=3
y=1
put this value of y in (1)
3x+5*1=17
3x+5=17
3x=17-5
3x=12
x=4
2006-11-08 05:15:22 · answer #1 · answered by Dupinder jeet kaur k 2 · 1⤊ 0⤋
x = 4 and y = 1
2006-11-08 05:07:27 · answer #2 · answered by princess 3 · 1⤊ 0⤋
y=1 thus x=4
2006-11-08 05:07:43 · answer #3 · answered by ♣ My Brainhurts ♣ 5 · 1⤊ 0⤋
x is 4 and y is 1
2006-11-08 05:07:04 · answer #4 · answered by Anonymous · 2⤊ 0⤋
3x+5y=17 A
3x+2y=14 B
A-B= 3y=3 or y=1
Therefore putting value of y in A
we get 3x+5*1=17 or 3x=17-5=12 or x=4
therefore x=4 and y=1
2006-11-08 05:10:38 · answer #5 · answered by MY Regards to All 4 · 1⤊ 0⤋
Here's how I would do it, and I know it works because I plugged my answers back into the original problems...
Solve for X in the first equation...
x = 17 - 5y over 3 (the entire expression 17 - 5y is divided by 3)
Now use that for X in the second equation and solve for Y.
Use the answer you get for Y to solve for X.
You will get that y = 1 and x = 4.
2006-11-08 05:11:57 · answer #6 · answered by Anonymous · 0⤊ 1⤋
3x +5y=17------->(1)
3x +2y=14-------->(2)
By elimination method
equation (1)-(2)
3x-3x=0;
5y-2y=3y
17-14=3
3y=3
y=1
subtitute y=1 into either of the equations.
i'll put equation (1)
3x+5(1)=17
grouping like terms
3x=17-5
3x=12
x=4
2006-11-08 05:41:53 · answer #7 · answered by Phy A 5 · 1⤊ 0⤋
I will start you off.
3x + 5y = 17, so 3x = 17 -5y.
Substitute 3x in second line with the above gives
17 -5y + 2y = 14.
17 -14 = 5y -2y
3 = 3y
2006-11-08 05:08:02 · answer #8 · answered by spiegy2000 6 · 0⤊ 1⤋
3x+5y=17
-
3x+2y=14
= 3y=3
therefore y = 1
so x must be 4
2006-11-08 05:15:02 · answer #9 · answered by matt151091 2 · 1⤊ 0⤋