Latest exam Aptitude Question SOLUTION: please show me how to solve by substitution 3x=-7 x+y=-9 I am not sure what to substtiute.

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Previous Question: A coffee merchant has coffee beans that sell for $9.00 per lb and $12.00 per pound. The two types are to be mixed to create 100 lbs of a mixture that will sell for $11.25 per pound Next Question: A purse has P218 in P10, P5, and P1 Coins. There are 46 coins in all and there are 4 more P5 coins than the P10 coins. How many of each kind of coin are there?? hope you can help me...

(#M40141884) EXAM Numerical Ability question Keep an EYE

please show me how to solve by substitution 3x=-7
x+y=-9 I am not sure what to substtiute.: Asked In exam (9 years ago); Unsolved; Is this Puzzle helpful? (0) (0) Submit Your Solution

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Previous Question: A coffee merchant has coffee beans that sell for $9.00 per lb and $12.00 per pound. The two types are to be mixed to create 100 lbs of a mixture that will sell for $11.25 per pound Next Question: A purse has P218 in P10, P5, and P1 Coins. There are 46 coins in all and there are 4 more P5 coins than the P10 coins. How many of each kind of coin are there?? hope you can help me...

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