Question

-2x+by=59

5x-y=1

If the system of equations above has exactly one solution (x,y) and x=2, what is the value of b?

Answer 1

b=7

Step-by-step explanation:

5(2)-y = 1

10-y = 1

y= 9

-2(2) + 9b=59

9b= 59+4

9b=63

b=7