Question

10 student took part in a quiz. if th numbe of the girls exceed the number of boys by 4. find the number of boys and girls

Answer 1

x=number of girls
y=no. of boys
eq.1
x+y=10
eq2
x-y=4
solve simultaneously
subtract 2 from 1
so 2x=14
x=7=girls
y=3 boys

Answer 2

$hey \: here \: r \: some \: equations \: which \\ can \: help \: u \: in \: solving \: this \: sum \\ as \: the \: number \: of \: girls \: and \: boys \: is \: 10 \\ therefore \: \\ let \: no \: f \: girls - x \\ let \: no \: of \: boys \: - y \\ therefore \: \\ x + y = 10 - - - 1 \\ x = y + 4 - - - - 2 \\ u \: have \: now \: to \: solv \: these \: two \: \\ eqations \: by \: graphical \: method$