3 years ago

A student bought some pens at 8 each and some pencils at 31.50 each. If the total

Mathematics

1 answer:

Wittaler [7]3 years ago

5 0

Step-by-step explanation:

Letthenumberofpensbexand

numberofpencilsbey

then

x+y=16ory=16−x

andtheirvalue

8x+1.5y=50

8x+(

)(16−x)=50

8x+24−(

)x=50

8x−(

)x=50−24

(

13x

)=26∴x=4

theny=16−x=16−4=12

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