What is: six more than the product of 21

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Me n o w. i need t h i s. 10 points

Hey hotel charges guests $19.75 a day to rent five video games at this rate which expression can be used to determine the charge for renting nine video games for one day at this hotel? pls