Answer:
C) x = 1
Step-by-step explanation:
By adding the like terms you get
-12x + 10 = -10x + 8
then you add 12x to both sides and subtract 8 to both sides and get
2 = 2x
which then you would divide 2 by 2 and get 1
For this case we must find the solution of the following equation:

If we subtract 3x from both sides of the equation we have:

Different signs are subtracted and the major sign is placed

We add 1 to both sides of the equation:

We multiply by -1 on both sides of the equation:

So, the solution is
Answer:

The ratio of areas is the square of the scale factor, so that factor is
√(320/180) = 4/3