4notebook+7pen =115
4notebook+2pen=90
what is the cost for 1notebookad1pen
Answers
Answered by
3
Answer:
20 notebook 5 pen maybe
Answered by
2
Answer:
NOTEBOOK= N
PEN= P
7 P= 115-4N
P=115-4N/7..........1
4N=90-2P
N=90-2P/4
PUT IN EQUATION 1
P=115-4*90-2P/4/7
Step-by-step explanation:
I THINK IT WILL HELP YOU
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