Question

please answer my question2x-7y=7 3x+y=22​

Answer 1

Step-by-step explanation:

2x - 7y = 7 ..............(1)

3x + y = 22 ............(2)

Multiply equation (2) by 7

7[3x + y = 22]

21x + 7y = 154 ............(3)

Add equation (1) and (3)

2x - 7y = 7

21x + 7y = 154

.............................

23x + 0y = 161

..............................

23x = 161

x = 161/23

x = 7

Now put the value of x in equation (1) to get the value of y so that,

2x - 7y = 7

2(7) - 7y = 7

14 - 7y = 7

-7y = 7 +14

-7y = 21

y =21/-7

y =-3

so we have x = 7 & y = -3