Question

solve. 2X+y=12and X+2y=9​

Answer 1

Answer:

please mark as brainliest

Answer 2

Answer :

• x = 5
• y = 2

Given :

• 2x + y = 12 and x + 2y = 9

Solution :

2x + y = 2 and x + 2y = 9

• 2x + y = 12 ... equation (1)
• x + 2y = 9 ... equation (2)

》x + 2y = 9

》x = 9 - 2y ... equation (3)

Now , putting the value of x in equation (1) from equation (3) we get

》2(9 - 2y) + y = 12

》18 - 4y + y = 12

》18 - 3y = 12

》- 3y = 12 - 18

》- 3y = - 6

》y = -6/-3

》y = 2

Now, putting the value of y = 2 in equation (1) we get,

》2x + y = 12

》2x + 2 = 12

》2x = 12 - 2

》2x = 10

》x = 10/2

》x = 5

Hence,

• x = 5
• y = 2