Question

5x+ y= 11;x+3y= 12 ​

Answer 1

Answer:

Step-by-step explanation:

x=(11-y)/5

11-y+15y=60

14y=49

y=2/7      

x=75/35    

x=15/7

Answer 2

Answer:

answer is x=3/2

y=7/2

explanation

5x+y=11 -equation 1

x+3y=12 -equation 2

from equation 2 we get

x=12-3y

put the value of x in equation 1

we get

5(12-3y) +y=11

60-15y+y=11

-14y=11-60

-14y=-49

y=7/2

by putting the value of y in equation 2

x+3y=12

x+3(7/2) =12

x+21/2=12

x=12-21/2

x=3/2