Help with simultaneous equations, please help!?

Question

Hi, i am stuck on my maths homework, we are studying simultaneous equations, and my question is;

3x+2y=7

2x+3y=9

I need to work out what x and y both, individually equal,

please can somebody help, also, I want working out, as I don't want to just copy,

10 points to first person who helps me, correctly.

Answer 1

3x+2y=7

2x+3y=9

first you have to solve for x on one equation take the second one.

2x=9-3y

x=(9/2)-(3/2)y

plug it into the first equation.

3x+2y=7

(27/2)-(9/2)y=7

-9/2y=7-(27/2)

-9/2y=14/2-27/2

y=-13/2(2/-9)

y=13/9 or 1.44

and

2x+3y=9

2x+3(13/9)=9

2x+39/9=9

2x=9-39/9

2x=(81-39)/9

x=42/9 times 2

x=84/9  or 9.33

Answer 2

y=2.6

X=0.6

Working:

multiply first equasion by 2 and second by 3 for this:

6x+4y=14. And

6x+9y=27

So...

Subtract the first new equasion from the second and u get :

5y=13

So y= 2.6

You can work out x easily from there

U may have the question wrong like that other guy sed but who knows... This fits :D

Answer 3

3x + 2y =7 (1) *2

2x +3y =9 (2) *3

6x + 4y = 14 (3)

6x +9y =27 (4)

(4) - (3)

5y = 13

y = 0.38

sub. into (2)

2x +3(0.38) = 9

2x +1.14 =9

2x = 7.86

x = 3.93

hey, i think thats right,  hope its helpful to you :)

x

Answer 4

145?

Answer 5

x is 0.6

and y is 2.6

yes.. or x is 3/5

  and y is 11/5

Answer 6

see my response to the first time you asked this question. I suspect you have one of the equations wrong and the 2nd equation should be:

2x - 3y = 9. If you have made a mistake in the equation then go and see my answer where I've worked out that y=-1 and x=3

Answer 7

1st 1       x=1 n y=2( 3+2=5 so u need to add 2 so..2*2)

2nd 1      x= 3 n y=1( "+"=5 so.....add six to make it 9 therefore 2*3)

U OWE ME TEN POINTS NOW