The cost of 3 oens, 4 rulers, 5 refills is Rs 75 while that of 10 refills,six pens and seven rulers is Rs 138.find the cost of 3 pens, one ruler and five riffles.
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Answer
RS. 39
Step-by-step explanation:
so 3P+4R+5REFILLS=75........ 1
10RE+6P+7R=138......2
SUBTRACT 2- 2*1=138-150
1 RULERS COST =12
SO WITH 1..... 3 PENS + 5 REILLS +4(12)=75
3 PENS +5 REFILLS +1 RULER=39
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