Posted by **connie** on Thursday, March 15, 2012 at 12:48pm.

REINY, Thank you for your answer and the answer is obviously correct when you go back and do the multiplying ......however , I do not just want the answer, I desperately wish to understand from start to finish how you got the answer. I am sorry if I seem stupid, really , but how did you get 2x = 18 , x=9 where did the 18 come from? I am so confused. Thanks for your help!!!! connie Original Question

solve if x=student price and y =adult price and 2y + 5x=77 and 2y + 7x=95 what are the price for admission for both adult and child. Your Answer:subtract them:

2x = 18

x=9

sub into the first:

2y + 45 = 77

2y = 32

y = 16

- Algebra 1 -
**Steve**, Thursday, March 15, 2012 at 2:39pm
You didn't read his response carefully. The first instruction was "subtract them".

Assuming you understand the context of the problem, he meant to subtract one equation from the other:

2y+7x=95

2y+5x=77

----------- subtract and the 2y-2y goes away!

2x = 18

so, x=9

smooth sailing from there on.

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