Question

attachment below

Answer 1

if you are confused between two parts just put the points to confirm... else solve these equations
I can tell you how to solve in case you dont know

Answer 2

start with the 3rd equation
2x+z = 9 => z= 9-2x
put the value of z in 1st and 2nd eqn
the question will transform into solving two variable

Answer 3

ok...

Answer 4

@divu.mkr so after going through this I actually think it is A?

Answer 5

yep

Answer 6

thanks :) for your explanation.