You should have posted this as a new question, not as a comment to someone else's thread.
<< 3x+5-4x = 7? >>
Just combine "x" terms and combine constants on separate sides of the equation
-x = 2
x = -2
x = -2
<< 3x+5-4x = 7? >>
Just combine "x" terms and combine constants on separate sides of the equation
-x = 2
x = -2
x = -2