A=4 2a-b=14

To find the value of 'b', we can substitute the value of 'a' in the second equation:

2(4) - b = 14

8 - b = 14

To isolate 'b', we can move 8 to the other side of the equation:

-b = 14 - 8

-b = 6

To solve for 'b', we multiply both sides of the equation by -1:

b = -6

Therefore, the value of 'b' is -6.