You have to add 75 to Both sides and 50+75= 125
So q=125. Hope this helped!
You simply divide 678 by 3 and get 226.
If we want to has 100 in the denominator we have to divide numerator and denominator by 2. Then total value of fraction doesnt change.

Now read the fraction, its 23 hundreds, now just write as decimal, so,
0.23
X-12 will give the other number
For #6 draw a triangle between the points and find the middle by drawing the lines to the middle. There should be triangles within the triangles which finding the hypotenuses should be the same.