Question

The ratio of boys to girls is 7:1. If there are 84 more boys than girls , work out how many boys there are

Answer 1

Answer:

98

Step-by-step explanation:

x: Boys

y: Girls

$\left \{ {{x=y+84} \atop {x=7y}} \right.$

Insert second equation into first one:

$7y=y+84$

$6y=84$

$y=14$

then substitute y value into second equation:

$x=7*14$

$x=98$