Question

slove 2x-3y=7 5x +y=9 by method of elamtion by eqution the coefficient​

Answer 1

Answer:

x=2, y= -1

Step-by-step explanation:

2x-3y=7  -------------- (1)

5x +y=9  -------------- (2)

(2) * 3 => 3(5x +y=9) = 15x+3y=27 -------- (3)

(1)+(3) =>

(2x-3y) + (15x+3y)  = 7 + 27

=> 2x+15x = 34

=> 17x = 34

=> x = 34/17 = 2

substitute the value of x=2 in (1)

=> 2x-3y=7

=> 2(2)-3y = 7

=> 4-3y=7

=> 3y = 4-7 = -3

=> y = -3/3 = -1

Answer 2

Answer:

x=2 ,y=-1

Step-by-step explanation:

hope it will help