you write an equation to show 54 pupil in class,3 more boys than the number of girls
Let b be the number of boys, g be the number of girls.
"54 pupils in class"
b + g = 54
"3 more boys than girls"
b = g+3
"54 pupils in class"
b + g = 54
"3 more boys than girls"
b = g+3