Answer:
Option C) b=6
Step-by-step explanation:
we know that
If two linear equations of a system of equations have an infinite of solutions, then both equations are identical
we have
[tex]y=6x-b[/tex] -----> equation A
[tex]-3x+(1/2)y=-3[/tex]
Multiply by 2 both sides
[tex]-6x+y=-6[/tex]
Adds 6x both sides
[tex]y=6x-6[/tex] ------> equation B
equate equation A and equation B
[tex]6x-b=6x-6[/tex]
solve for b
[tex]b=6[/tex]
