Question

chapter name simple equation please solve it class' 7​

Answer 1

Answer:

total student 42

the girl =X

the boy's =Y

the boys are 2/5 of girl

therefore Y=(2/5)X

total student =X+((2/5)×X)=42

=(7X/5)=42

=7X=210

X=30

therefore boy's =Y=(2÷5)X

Y=(2÷5)×30

boys =Y=12

Therefore

number of girls 30

number of boy's 12