a.u.s nickel contains 3.9g of copper and 1.2g of nickel.
how many kilograms of copper must be combined with 500 kg of nickel to make nickel coins?
1,625
You also can write fraction:
3.9/1.2=x/500
1.2*x=3.9*500
1.2*x=1950 Divide with 1.2
x=1950/1.2
x=1625
1625
copper/nickel=3.9/1.2=3.25
500*3.25=1625 kg of copper
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