Question

solve by cross multiple 2x+3y=9,3x+7y=5​

Answer 1

Answer:

x = 9.6, y = -17/5

Step-by-step explanation:

2x + 3y = 9

2x = 9 - 3y

x = (9 - 3y) /2

now here is the value of x, so =>

3x + 7y = 5

3{(9 -3y)/2} + 7y = 5

(27 - 9y)/2 + 7y = 5

27/2 + (14 - 9)/2 = 5

13.5 + 5y/2 = 5

5y/2 = 5 - 13.5

y = -8.5 × 2/5

y = -17/5

now we will put this value of 'y' in the 1st eq.

2x + 3y = 9

2x + 3(-17/5) = 9

2x - 51/5 = 9

2x = 9 + 51/5

x = 96/5×2

x = 9.6

I hope it will help full,

and please mark me as brainlist

Answer 2

HERE YOUR ANSWER MATE....;

$= > 2x + 3y = 9$

MULTIPLE BY 3 , WE GET ;

$= > 6x + 9y = 27 \: \: \: (1 {}^{st} eq {}^{n} )$

Now,

$= > 3x + 7y = 5$

MULTIPLE BY 2 , WE GET ;

$= > 6x + 14y = 10 \: \: \:( 2 {}^{nd} eq {}^{n} )$

SUBTRACT 2-1 , WE GET;

$= > 5y = - 17$

$= > y = \frac{ - 17}{5}$

Put value in 1 EQUATION we get;

$= > 6x + 9 \times \frac{ - 17}{5} = 27$

$= > 6x = 57.6$

$= > x = \frac{57.6}{6}$

$= > x = 9.6$

HOPE IT'S HELPFUL....:-)