A=6 2a-b=15

To solve the equation 2a - b = 15, we can use the value of a given as 6.

Substituting the value of a into the equation, we get:

2(6) - b = 15

Simplifying the equation, we have:

12 - b = 15

To isolate the variable b, we can subtract 12 from both sides of the equation:

• b = 15 - 12

Which gives us:

• b = 3

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

b = -3

Therefore, the value of b is -3.