Question

solve for x and y :4. 2x-3y=13,7x-2y=20​

Answer 1

Answer:

x=2 and y=-3

Step-by-step explanation:

multiply first equation by 2 and 2nd equation by 3

4x-6y=26

21x-6y=60

and then subtract

-17x=-34

x=2

and then y=-3

Answer 2

the given system of equation is

2x -3y= 13....(.i)

7x -2y =20 ... (ii)

on multiplying (i) by 2 and (ii) by 3 we, get

4x -6y =26 (iii)

21x- 6y =60 .... (iv)

on subtracting iii from iv we get

17x = (60 -26)= 34

》x=2

on substituting the value of x =2 in (i),

we get:

4-3y =13

》 3y = (4-13) =-9

》y = -3

Hence , x=2 and y= -3