Is 3+ (-4) the same as -4 + 3

Which of the following system of equation is not equal to the system of equations is not equal to the system of equations shown below

Angela rode his bike around a bike trail that was 1/4 of a mile long he rode his bike around the trail 8 * angelo says he wrote a total of 8/4 miles to russell says he's wrong and he actually and says that he actually wrote to my who is corrupt use words and trying to explain how you know.

For the equations below which statement is true ? -2x=14 6x=-42