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

Question

asked Oct 18, 2020 190k views

1 Answer

Molo · Answer 1 · 2020-10-25T07:06:50+0000

Answer:

98

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