A student brought some pens at 8 rupees each and some pencils at 1.50 rupees each. If the total number of pens and pencils purchased is 16 and their total cost is 50 rupees, how many pens did he buy?
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Hlw mate!!
Let the number of pens = x
& number of pencils = y
x+y =16 ________(1)
8x + 1.5y = 50 __________(2)
Now, solve the above equations
Multiply eq (1) both by 8
8x +8y = 128
8x + 1.5y = 50
___________
- - -
6.5y = 78
→ y= 12
& put the value of y in eq (1)
x + y = 16
→ x = 4
pens = 4 & pencils = 16
Hope it helpful
Let the number of pens = x
& number of pencils = y
x+y =16 ________(1)
8x + 1.5y = 50 __________(2)
Now, solve the above equations
Multiply eq (1) both by 8
8x +8y = 128
8x + 1.5y = 50
___________
- - -
6.5y = 78
→ y= 12
& put the value of y in eq (1)
x + y = 16
→ x = 4
pens = 4 & pencils = 16
Hope it helpful
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