3x−4y=−10

Question

3x-4y=-133x−4y=−13

Answer 1

check and see what you typed.

if you are attempting to write and solve the two equations
3x - 4y = -10
3x - 4y = -13

If you subtract one from the other, you end up with
0 = 3, which of course is nonsense.

If that happens,
you will not get a solution, since you have two parallel lines.
Of course they can never intersect.

Answer 2

why repeat things? so annoying
3x - 4y = -10
3x - 4y = -13
clearly, there are no solutions to this pair of equations, since -10 ≠ -13