X-y=11
2x+y=19
equations by elimination

x=10, y=-1

(10,-1)

Step-by-step explanation:

x-y=11

2x+y=19

Add these two equations together to eliminate y

x-y=11

2x+y=19

3x = 30

Divide each side by 3

3x/3 = 30/3

x = 10

Now we need to find y

2x+y = 19

2(10) +y = 19

20+y =19

Subtract 20 from each side

20-20 +y = 19-20

y= -1

step-by-step explanation:

well if you round, things become much more simple. round 5.95 to 6, 4.25 to 4, and 1.05 to 1. now, add 6+4+1 and that would equal 11. so the items together would equal to about $11.

inverse operation of addition