From the pair of linear equations in the following problems, and find their solutions graphically.(i)      10 students of Class X took pan in a Mathematics quiz. If the number of girls is 4 more than the number of boys, find the number of boys and girls who took part in the quiz.(ii)     5 pencils and 7 pens together cost Rs 50, whereas 7 pencils and 5 pens together cost Rs 46. Find the cost of one pencil and that of one pen.

Explanation

Given that,


Total number of students who took part in the the quiz =10.


Let, the number of boys who took part in the quiz =x


and, number of girls who took part in the quiz =y


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