I need to be shown the process of doing these three problems so I can solve others like it, so when you solve them please try to show as much of the process as possible. solve the equation using substitution
x = y – 4

2x + 3y = 12

Solve the system using elimination.

2x – 3y = 16

x + y = 24

Solve the system using graphing.

x + y = 7

3x + 4y = 24

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.