IBM
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The cost of four dozen proof machine ribbons and five dozen accouting machine ribbons was Rs.160/-. If one dozen accounting machine ribbons cost Rs.20/-, what is the cost of a dozen proof machine ribbons?
Read Solution (Total 2)
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- 4x+5y=160
4x+5(20)=160
4x=160-100
x=60/4
x=15.
Ans:15 - 11 years agoHelpfull: Yes(24) No(0)
- Given:
4( dozen Proof machine)+5(dozen Accounting machine)=160
Also 1 dozen Accounting machine=20
Therefore,
4( dozen Proof machine)+5(20)=160
4( dozen Proof machine)=160-100
4( dozen Proof machine)=60
dozen Proof machine=60/40
dozen Proof machine=15 - 9 years agoHelpfull: Yes(4) No(0)
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