Question

if 2x+y+z=15 and x-2y-2z=6,then find the value of x+8y+8z where x,y,z are real numbers.​

Answer 1

Answer:

12

Step-by-step explanation:

multiply 1 st eq by 2 and 2nd eq by 3 and substract

4x+2y+2z=30

-

3x-6y-6z=18

we get

4x+2y+2z=30

-3x+6y+6z=-18

solving

x+8y+8z=12