A jeweller has bars of 18 carat gold and 12 carat gold. How much of each must be mix together to obtain a bar of 16-carat gold weighing 120 grams
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12+4 carrot gold In 120grams
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let 18 carat gold be x and 12 carat gold be y
according to 1st condition
x+y=120
according to 2nd condition
18x+12y=16×20
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after adding the equations of two conditions you will get the ans
according to 1st condition
x+y=120
according to 2nd condition
18x+12y=16×20
.
.
.
.
after adding the equations of two conditions you will get the ans
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