Answer:
b= 13
Step-by-step explanation:
First, to make it easier, I switch the order of the equation(it does not change the answer depending on how you change it) to -2b+11= -15. It is the same thing as -15 =11-2b, just the order is switched to make it seem simpler. Now, we subtract 11 from both sides(-15-11) to get -2b= -26. After that, you divide -2b from -26, which is 13