7+6x= 3x+3+4x
7+6x= 3x+4x+3
7+6x= 7x+3
move +7x to the other side
sign changes from +7x to -7x
7+6x-7x= 7x-7x+3
7-x= 3
Move 7 to the other side.
Sign changes from +7 to -7.
7-7-x= 3-7
-x= -4
Multiply by -1
-1(-x)= -1(-4)
x= 4
answer: x= 4
