Question

9x - 2y = 20
3x + y = 5​

Answer 1

let x be 1

9×1-2y=20

9-2y=20

2y=20-9

2y=11

y=5.5

x=9×1 , y=2×5.5

Step-by-step explanation:

y =11 ,x=9

Answer 2

Answer:

first we find done the equation 1st

9x-2y=20

9x=20+2y

x=20+2y/9 ........ (1)

now,put the value of x in second

we have,

3x+y=5

3×20+2y/9+y=5

60+6y/9+y=5

60+6y+9y/9=5

60+15y=9×5

60+15y=45

60-45= -15y

15= -15y

y= -1

now put the value of y in equation 1

x=20+2(-1)/9

x=20-2/9

x=18/9

x=2

so x=2

& y= -1