Irwin has only $30 to spend at a carnival admission cost $5 lunch will cost $6 and each ride ticket cost a 1. 25 what is the number of ride tickets that she can buy

Well, if lunch is 6$ and admission is 5$. we can say 11$ will be already roughly spent. So, we have 19$ left for rides? so it'll look something like this ...

1.25R = 19

now divide both sides by 1.25 ...

R = 15.2

so roughly they can ride 15 rides and have 20 cents left