Question 664153
Starting with 
4x - 3 = 7x - 3 - 3x
Group like terms
4x - 7x + 3x = - 3 + 3
0x = 0
0 = 0
Alternatively,
4x - 3 = (7x-3x) - 3
4x - 3 = 4x -3
4x - 4x = -3 + 3 
0 = 0
When x is 0, -3=-3
.........................
Delighted to help.
-Reading Boosters
Wanting for others what we want for ourselves.
www.MyHomeworkAnswers.com