Question

3. If 3x-y=11 and x-3y=17 then find the value of x-y​

Answer 1

Answer:

x = 2

y= 3...............

Answer 2

Step-by-step explanation:

hey mate here is your answer ☺️:

given,

3x-y=11. { let it be equation 1}

x-3y=17{ let is be equation 2}

so now ,

multiply equation 2 with 3

3(x-3y)= 3(17)

= 3x-9y=51 { let it be equation 3}

subtracting equation one with equation 3:

3x-y -(3x-9y) = 11-(51)

3x-y-3x+9y =-40

3x-3x-y+9y= -40

8y= -40

y= -5

so now,

substituting value of y in equation 2:

x-3y=17

x-(-5)=17

x+5=17

x=12

so value of x-y= 12-(-5)= 12+5= 17

:. value of x-y=17

please mark as a brainliest answer