a sum ‘s’ is devided into 4 parts.second person gets Rs 10 more than first.3rd person is Rs 10 more than second, 4th is 10 more than 3rd. how much amount do 1st person get?
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s=a+(a+10)+(a+10+10)+(a+10+10+10)
s=4a+60
a=(s-60)/4
(s-60)/4