Decide which variable to isolate. Then substitute for this variable, and solve the system. y = x - 5, x + y = 9

x = 7

y = 2

Step-by-step explanation:

x + y = 9 but y = x - 5

x + (x - 5) = 9

2x - 5 + 5 = 9 + 5

2x/2 = 14/2

x = 7

y = x - 5

y = (7) - 5

y = 2

answer: 20

step-by-step explanation: subtract the minimum date value from the maximum data value to find the date range. in this casem the date range is 42 - 22 = 20

hope this ! : ) ~zane