Question

Find x if 4x+7 - x+45

Answer 1

4x +7 -x +45 =0
4x-x +7 +45 = 0
3x + 52 = 0
x = -52/3

Answer 2

I'm giving you two answers as the question is not proper.

if the question is 4x+7 = x + 45

Arrange all terms to one side of equation

4x+7-x-45=0

3x -38= 0
3x= 38
x = 38/3.

if the question is 4x+7 -x +45= 0
3x +52=0
3x=-52
x= -52/3.

Hope it helps
Thank you