Simultaneous Equation

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Question 35

waecmaths question: 

A messenger was paid N2.50  an hour during the normal working hours and N4.00 an hour during overtime. If he received N31.00 for 10 hours works, how many hours are for the overtime?

Question 12

waecmaths question: 

Five bottles of Fanta and two packets of biscuits cost Gh¢ 6.00. Three bottles of Fanta and four packets of biscuits cost Gh¢ 5.00. Find the cost of a bottle of Fanta.