The pair of variables x=-3, y=8 is the solution to the equation 5x+by=17. Find the coefficient b.

X = - 3, y = 8

Plug in the variables

5 (-3) + b (8) = 17

-15 + 8b = 17

Add 15 to both sides of the equation. By doing this, you can eliminate the 15 on the left side.

8b = 17 + 15

8b = 32

Divide 8 on both sides

b = 4