Y = -7x -1
4x - 7y = 7

  (x, y) = (0, -1)

Step-by-step explanation:

Since we have an expression for y, it is convenient to substitute that into the second equation:

  4x -7(-7x -1) = 7

  4x +49x +7 = 7

  53x = 0

  x = 0

Substituting into the first equation gives ...

  y = -7·0 -1

  y = -1

The solution is (x, y) = (0, -1).

15% chance.

step-by-step explanation:

3/10 times, the 5 year old will get a tablet. 5/10 times, the 13 yer old will get a tablet. multiply both fractions to get 15/100 times, both would have a tablet.

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step-by-step explanation: