Start by distributing -6 to x and -7 on the left side, and distributing -2 to 4 and 3x on the right side. This will cancel out our parentheses.
-6x-42=-8-6x
Now get x to one side of the equation. Add 6x to both sides.
x ends up cancelling out on both sides. There is no solution for x in this equation, because you end up with -42=-8, which is not a true statement.
@-Happy7