Question

Copper that was 95% pure was melted together with copper that was 75% pure to make 15 kilograms of alloy that was 83% pure. How many kilograms of each kind were used?

Answer 1

well we have 2 bits of information here

a + b = 15 for the total weight of them combined

and

.95a + .75b = 15(.83) for the final copper results

Answer 2

solve the system with your favorite method

Answer 3

am i solving for A or b?

Answer 4

well both actually. it wasnt to know what the values of a and b are

Answer 5

hmm, im confused

Answer 6

how so?

Answer 7

I'm not quite understanding what im solving for exactly, this problem is pretty hard for me :/
I want to understand it so if i see more like i ill know what to do

Answer 8

we know that some amount of 'a' and some amount of 'b' are poured together to get 15 kg in total

a+b = 15

hows this so far?

Answer 9

yes i think i get it

Answer 10

OHHH YEAH I GET IT

Answer 11

IM A DUMB retrice:D

Answer 12

Ty m8, ily

Answer 13

we are told that one of the amounts is 95% copper, and the other is 75% copper and the final product is 15 kg that is 83% copper

Answer 14

youre welcome :)