Question

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Find the graphical solution for the given problems.

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 (a).In Class 10th, 10 students participated in a Maths test. If there are 4 more girls than the total number of boys, find how many girls and boys participated in the test.

(b)The total cost of 5 erasers and 7 chocolates is Rs.50, but the total cost of 7 erasers and 5 chocolates is  Rs. 46. Now, calculate the cost of one eraser and the cost of one chocolate.

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Answer 1

$<h4>REFER THE ATTACHMENT.$

ANSWER : ( a ).

x = 3, y = 7

ANSWER : ( b ).

x = 3, y = 5

Answer 2

"Let the number of boys be x and the number of girls be y.

"Then the equations formed are

"x + y = 10 ….(1) and y = x + 4 ….(2)

"Let us draw the graphs of equations (1) and (2) by finding two solutions for each of the equations.

"The solutions of the equations are given.

"x + y = 10 ⇒ y = 10 – x

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