Answer:
(9,3)
Step-by-step explanation:
First plug the given numbers into the equation:
-4(9)+6(3)
The answer comes out to be 18, therefor -4(9)+6(3)=18
For the second equation, Y=3 therefor after plugging the "x" into the second equation -2(9)+21 the answer comes out to be 3, therefor it is true that 3=-2(9)+21
