Xavier is thinking of a number. nine more than four times the number is the same as fifteen less than twice the number. What is Xavier’s number?

Yvonne is thinking of a number. Fifty, decreased by three times the number, is the same as seven times the number, increased by 80. What is Yvonne’s number?

Zabato is thinking of a number. Three times the sum of the number and ten is the same as eight times the number. What is Zabato’s number?

The Sun Spa charges annual dues of $125 plus $10 per hour to use the facilities. The Moon Spa charges annual dues of $230 plus $7 per hour to use the facilities. For what number of hours would the two spas charge the same total amount?

Simon says: “Five times my age 4 years ago is the same as 3 times my age in 2 years.” How old is Simon now?

plz help me and if u could show me how to do it i would be greatful!