Answer:
x=-8
Step-by-step explanation:
The reason why x is -8 is because
The first step is to isolate the x
To isolate the x you got to add 12 to both sides
x-12+12=-18+12
the -12 gets canceled out by the positive twelve so all thats left now is
x=-18+12,-18+12 is -6 so its
x=-6
The second step is to divide
now you have to divide by
on both sides

which
is taken out on the left side because its divided by itself so all thats left is a one,while on the right side -6 divided by three-fourths is -8