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User Franz
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1 Answer

4 votes

D

1) Keeping in mind that the equation is 7x +1 = 10x

7x ---> Refers to 7 times x,

1 ---> Constant

10x

2) Noticing that x can be "miles per hour" So we can write

Brody: 7x + 1 1st day

Brody: 10x 2nd day

And 7, and 10 are the number of miles, and x the number of hours:

7x +1 = 10x

7x -10x = -1

-3x =-1

x=1/3 hour

3) Hence, the answer is D

User Diego Alonso
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