Question

If 30 boys and girls went to the zoo and there were 6 more boys than girls, how many girls went to the zoo?

Answer 1

Let's get this into equations:

Explanation:

`B+G=30`
`B=G+6`

Substitute `B`:

`(G+6)+G=30->`
`G+6+G=30->` subtract 6 on both sides:
`G+G+cancel6-cancel6=30-6->`
`2G=24->G=24//2=12`

Answer : 12 girls (and 18 boys).