jellybellyje
08.12.2020 •
Mathematics
During and 8-hour shift, a highway toll worker collected 672 tolls. The number of tolls collected per hour is represented by c. Part 1: Select the equation that represents the situation.
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Ответ:
x=-1/2, y= -5/2
Step-by-step explanation:
x-y=2
x+y=-3
Add these together to eliminate y
x-y=2
x+y=-3
2x = -1
2x/2 =-1/2
x = -1/2
Now we need to find y
x+y = -3
-1/2 +y = -3
Add 1/2 to each side
-1/2 +1/2+y = -3+1/2
y = -6/2+1/2
y =-5/2