8 pens and 5 pencils costs $1003 pens and 7 pencils costs $58 .find the cost of 2pen and 1 pencil together.
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Answer:
it costs rs 24
Step-by-step explanation:
let the cost of a pen be X and the cost of a pencil be y
now,
8x +5y= 100
3x + 7y = 58
solve the equations we get X =10and y = 4
so 2x + 1y = 20+4=24
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