Question

If x+2y+3z=10 and 2x +3y +4z =15 then find the value of 5x+6y +7z?

Answer 1

Answer:

25

Step-by-step explanation:

x+2y+3z=10 --- (1)

2x+3y+4z=15 --- (2)

We can add x+y+z multiple times to obtain 5x+6y+7z.

And it is possible.

By elimination method (2)-(1)

∴x+y+z=5

By adding it multiple times to (2)

(2x+3y+4z)+3(x+y+z)=10+15

Therefore, 25.