Aline is written in standard form ax+by=c where a does not =0 find the x-coordinate of the point on the line at which y=3

  x = (c -3b)/a

Step-by-step explanation:

Substitute 3 for y and solve for x.

  ax +b·3 = c

  ax = c -3b . . . . . . . subtract 3b

  x = (c -3b)/a . . . . . divide by the x-coefficient

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step-by-step explanation:

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answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.