# A certain class consists of 45 grade 8 students. The no. of boys is 9 more than the no. of girls. How many boys and girls are there? (Solving systems of linear equations using elimination method)

2
by Chlorine

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by Chlorine

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y be the number of boys

x + y = 45

y = x + 9

x + x + 9 = 45

2x = 45 - 9

2x = 36 or x = 18

Therefore : girls = 18

boys = 27

2x + 9 = 45

2x +

2x = 36

2x

x = 18 - no. of girls

x + 9 = 27 - no. of boys