# math

posted by .

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?

• math -

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.

2x-y=1
again, plug in 2 and 3..
2(2)-1=1
4-1=1
3=1
so no, it's not the solution for the problem

hope I helped!

• math -

wait, number two is wtong.. sorry!!

2. 2x-y=1
plug in 2 and 3..
2(2)-3=1
4-3=1
1=1
so yes, (2,3) is the solution to the problem

((:

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