Question

5x/7-1/4=9/28

Answer 1

To solve for x, you need to get it alone.
Start by adding 1/4 to both sides. What do you get?

Answer 2

5x/7+1/4=9/28+1/4?

Answer 3

Close,
5x/7 -1/4 +1/4 = 9/28 +1/4
(Remember, on the left hand side, you are trying to get rid of the 1/4 so you do the opposite and you have to show it.)
So you get
5x/7 = 9/28 + 1/4

what is 9/28 +1/4?

Answer 4

\[\frac{5x}7-\frac14=\frac9{28} \]
\[\frac{20x - 7}{28} = \frac9{28}\]
\[=> 20x - 7 = 9\]
\[=> 20x = 9+7 = 16\]
\[=> x = \frac{16}{20} = \frac45\]