Solve for X

1/w + 1/y = 1/x

Step-by-step explanation:

1/w + 1/y = 1/x               Multiply through by wy

y +  w = 1/x

  wy

Multiply both sides by x

x * (y + w) = 1

    wy

Multiply both sides by wy

x * (y + w) = wy

Divide both sides by (y + w)

x = wy / (y + w)

b) the dogs need to shift their focus to human scent.

x/3-10=8

x/3=18

x=48