Solve the system of equations using elimination. make sure to show all work and find the value of both x and y
x-3y = 7
3x + 3y = 9
8x+ 3y = 1
4x + 2y = 0

x=4, y=-1. (4, -1).

Step-by-step explanation:

x-3y=7

3x+3y=9

x=3y+7

3(3y+7)+3y=9

9y+21+3y=9

12y+21=9

12y=9-21

12y=-12

y=-12/12

y=-1

x-3(-1)=7

x+3=7

x=7-3

x=4

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles

24+x=y

step-by-step explanation: