He is inside the building cleaning the windows.
5b-1 equal to (sorry cant add the sign) -11
5b - 1 = -11
5b = - 11 + 1
5b = - 10 divide both by 5
b = - 2
51 cats
he fell on to a balcony
he is on the inside of the building!
You must know at least one angle or two sides.
Can you just use this it's VERY easy to use the negitive sign on the keyboard it's just the dash button hope my tip helped ya if not please tell me CLEARLY when you need help on thanks ^-^