Question 64570
4x-7=3x

First subtract 4x from each side
 4x-7=3x
-4x  -4x
 
 -7=-1x
Then divid -1x from each side

 -7=-1x
 __  ___
-1x  -1x
And you get 7
x=7



Check
4x-7=3x
4(7)-7=3(7)
28-7=21
21=21