1/2x = -9 what to do help

Step-by-step explanation:

I'm assuming that you are solving for x, since there's nothing else you can do with this mathematically.

and the goal is to get the x all alone. So we have to lose the fraction. Do that by multiplying by the reciprocal of 1/2 which is 2/1 (a reciprocal is just a fraction flipped upside down). BUT...because this is an equation, what you do to the left side has to be done to the right side too. Like this:

On the left, everything cancels out but the x (which is why we do this), and on the right we multiply straight across the top and straight across the bottom to get

which is

x = -18

12

step-by-step explanation:

12 + 5 = 17

12x2=24

24-7=17