My question is what is 7+6x=3x+3+4x

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