Answer:
see below
Step-by-step explanation:
It is only necessary to compare the equations, not to solve them. The first three equations are equivalent, either because the terms were rearranged, or because they were all multiplied by -1.
The last equation is not equivalent, because some terms are multiplied by -8/7 and others are not. When different things are done on either side of the equal sign, it changes the equation, resulting in a different solution.
