Question

For his chemistry experiment, Martin needs 3 liters of a 40% alcohol solution. The lab has two containers, one with 20% alcohol solution and the other with 50% alcohol solution. And I need to find a set of linear equations. please help me

Answer 1

@Frozen15

Answer 2

@AloneS

Answer 3

what do you think? Any ideas, thoughts?

Answer 4

Well, I started to figure out the problem and when I plugged my answers back into the equation, it was wrong

Answer 5

Hmm can you tell/show me your equation you did?

Answer 6

so, I had to identify the variables which were x=20% alcohol solution and y=50%solution. then x+y=3 but I don't think thats right. I feel like that's probably where I screwed up. I was just following a problem I had that was similar

Answer 7

Hmm i feel you did do right here but of course we have to MAKE SURE. But you got 3 for your answer? im a little confsued

Answer 8

x+y=3
.20+.50=1.2 (because I multiplied 3*.40)

.20x+.50y=1.2
.20(3-y) + .50y = 1.2
.6-.20y+.50y=1.2
.6-.7y=1.2
-.6 -.6
-.7y=.6
/-.7
y=-.857142857

x=3-y
x=3-(-.857142857)
x=3.857142857

Answer 9

@Frozen15

Answer 10

@AloneS

Answer 11

I just need help :.(..