Question

HELP PLEASE! Nelson wants to use a few pieces of silver to make a bracelet. Some of the jewellery is 70% silver, and the rest is 58% silver. Nelson needs 26g of 65% silver for the bracelet. How much of each alloy should he use?

Answer 1

let x=grams of 70% silver
let y= grams of 58% silver
x+y=26
0.70x+0.58y=0.65

i just need to know, is that the right way to set it up?

Answer 2

that's almost right.
your last equation should read 0.70x+0.58y=0.65(x+y)

Answer 3

does that make sense?

Answer 4

uhmm..
oh yess i think i get why you put the (x+y) at the end

Answer 5

yeah cause you need 26g of the 0.65

Answer 6

exactly!

Answer 7

couldnt you just write 0.70x+0.58y=0.65(26)?

Answer 8

yeah that works as well :)

Answer 9

k thanks so much youre saving my life here :)

Answer 10

i'm glad to be of service :)

Answer 11

This one !

Answer 12

ok

Answer 13

I got x=-35.5

Answer 14

I don't think that is right

Answer 15

because it shouldn't be a negative :P

Answer 16

no you should get 15.167

Answer 17

Hmmm

Answer 18

Here ill show you my steps

Answer 19

Awesome