Question

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

Answer 1

b=4

Explanation:

x=-3 y=8

5x + by = 17

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

-15 + 8b = 17

+15 +15

8b = 32

8b/8 = 32/8

b = 4