Question

check wheather the ordered pairs is a soultion of the system
first one to answer gets a medal
(1,2)
3x-2y=1
x+4y=9

Answer 1

no, if we plug in those values into the first equation we -1=1

Answer 2

so there both no

Answer 3

well, the values (1,2) work for the second one but not fir the first

Answer 4

its not a solution to the system because it only works in equation 2. for it to b the solution it has to work in both so the answer is no as lagrange said