3 x - 1 equals 0 to x + y equals -10 tell which equation you would choose to solve for one of the variable

Answer 1

3x - 1 = 0 is easy to solve:

3x = 1 by adding 1 to each side.

x = 1/3 by dividing both sides by 3.

x + y = -10 so

x = -y -10 or

y = -x -10 by subtracting one of the variables from each side.

The first equation provides a definite answer, whereas the second equation provides a simplified look at what was a part of a system of equations.