I think it should be 1/343
The standard form is Ax + By = C
with A being both positive and non-fraction
so we are given 3x - 9 = 7y
we add the 9 to both sides
3x = 7y + 9
and subtract the 7y from both sides
3x - 7y = 9
There you have it in standard form
Hope this helps ;)
2/3 of 225
= 2/3 x 225
= 150
The answer should be 0.2 and 11.8 :) i hope this helps!