Question

1. Form the pair of linear equations in the following problems, and find their solutions
graphically.
(1) 10 students of Class X took part 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 50, whereas 7 pencils and 5 pens together
cost 46. Find the cost of one pencil and that of one pen.​

Answer 1

1. Let the no. Of boys be x and girls be y

10-x=y

2.