math
posted by Carla .
Can you help me answer this question?
I have no idea how to do this...
1. Is (2,3) as solution of the system
3x +4y = 18
2x  y =1?

3x+4y=18
you just plug in 2 and 3..
3(2)+4(3)=18
6+12=18
18=18
so yes, (2,3) is the solution for the first problem.
2xy=1
again, plug in 2 and 3..
2(2)1=1
41=1
3=1
so no, it's not the solution for the problem
hope I helped! 
wait, number two is wtong.. sorry!!
2. 2xy=1
plug in 2 and 3..
2(2)3=1
43=1
1=1
so yes, (2,3) is the solution to the problem
((:
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