You need to isolate the variable x. You can do that by either adding, subtracting, multiplying, or dividing each side by whatever number. Some examples are #2
x-2=-9
+2 +2
x=-7
#7
-75=-5x
----- ----- <---- means dividing
-5 -5
15=x
#12
3/4=x/16
Multiply each side by the reciprocal of the fraction with the variable.
16/1 • 3/4=x/16 • 16/1
If you do that and then simply on the 16/1 • 3/4 side to make it easier you should get
12=x
