Question

solve x and y 2x-7y=13;7x-2y=20​

Answer 1

Answer:

2x-7y=13

2x=13-7y

x=13-7y/2

put x=13-7y/2 in eq. 2

7×13-7y/2-2y=20

91-7y-4y=40

51=11y

y=51/11

put y=51/11 in eq.1

2x-7×51/11 =13

2x= 13+357/11

22x=500

x=500/22

x=250/11