if the cost of 5 pencil is same as the cost of 1 notebook. if the cost of 7 pencils and 7 notebook together is 210 then find the cost of 2 pencils and 3 notebooks.
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Step-by-step explanation:
let cost of 1 pencil be x
and cost of 1 notebook be y
according to given condition......
5x = y
5x - y = 0..............(1)
according to given condition......
7x + 7y = 210.......(2)
solve (1) &(2)........
7x + 7y = 210
35x - 7y = 0 ....... (multiplied (1) by 7)
____________
42x = 210
x= 5
substitute x= 5 in (2)
7x + 7y = 210
7y = 210 - 35
y = 25
2x + 3y = 10 + 75 = 85
your answer is 85
HOPE IT HELPS................
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