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The cost of 3 pens and 4 pencils is ₹84. Make a linear equation taking cost of pen is X and cost of pencil is Y. Also find the cost of pen if each pencil cost ₹4
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hlo here is your ans
let pen =xand pencil=y
there are 3 pens ans pencils cost = 84
so linear eq become =3X+ 4y= 84. eq (!)
and in the second point the cost of pen =4 so
3
y=4
so 3x+(4+×4)=84
3x=84-16
x=68/3=22.66
let pen =xand pencil=y
there are 3 pens ans pencils cost = 84
so linear eq become =3X+ 4y= 84. eq (!)
and in the second point the cost of pen =4 so
3
y=4
so 3x+(4+×4)=84
3x=84-16
x=68/3=22.66
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