Try plugging in the x and y values into the equation to see if both are true:
A (5,5) 2(5)+4(5)=22 10+20=22 30=22 Since this obviously does not work there is no point in plugging it into the second equation as well. B (5,4) 2(5)+4(4)=22 10+16=22 26=22 Since this does not work either, we can move on from this one as well. C (5,2) 2(5)+4(2)=22 10+8=22 18=22 Okay, this doesn't work either, now it's probably the last one but it's important to check to make sure D (5,3) 2(5)+4(3)=22 10+12=22 22=22 Since this worked, put the numbers in the other equation just to make sure 6(5)+2(3)=36 30+6=36 36=36 D is the answer
