168-x/x=2/5
(168-x)5=2x
2x=840-5x
X=840/7
X=120
168-1=2/5 NO IT DOES NOT
YOU NEED TO USE BRACKETS
I EXPECT THAT YOU MEAN
(168-x)/x=2/5
This is the question that anon answered (thanks anon ) but it is not the question that you asked!