Question

2x - 3y = 4
x + 4y = -9

Answer 1

solve for only one variable using the first (or second equation) then plug that answer back into the other equation

Answer 2

There's multiple methods of solving these

Answer 3

example solve for x in equation 1, then plug that answer (which will include only y) back into the second equation and solve for y.

Answer 4

I prefer to put both equations in the form

y = mx + b, then set y = y and solve for values of x and y