Mathematics of the sixth grade in primary school Volume 4 - Training Enrollment Network

Mathematics of the sixth grade in primary school Volume 4

Suppose there are x girls, then there are 8x/9 boys.

Now there are x+ 1 girls.

So 8x/9=(6/7)(x+ 1)

8x/9=6x/7+6/7

(8/9-6/7)x=6/7

(2/63)x=6/7

x=6/7÷2/63=27

8x/9=(8/9)×27=24 '

A: There are 24 boys and 27 girls.

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