Ellen set her watch 3 seconds behind, and it falls behind another 2 seconds every day. How many days has it been since Ellen last set her watch if the watch is 7 seconds behind? Write and solve an equation to find the answer.

2 days.

Step-by-step explanation:

1) 7÷2=3.5

2)3.5 is the number of days but, you said she set it 3 seconds behind do we do 7-3=4

3)4÷2=2 days

2 days

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-9

step-by-step explanation:

y=-2.5x+12.5

step-by-step explanation:

5y=2x+10

y=0.4x+2

slope=-2.5

5=-2.5*3+b

b=12.5