Question

Find the solution to the equations.

3x - y = -4
x + y = 0

(0, 0)
(-1, 1)
(1, -1)

Answer 1

you can solve this problem using substitution.

first, solve the second equation for y. basically, we want to isolate the "y" variable here

Answer 2

@Sydney77 let me know if you understand :)

Answer 3

Simple

Answer 4

I will try to solve your system of equations.
3x−y=−4;x+y=0
Step: Solve 3x−y=−4 for y:
3x−y+−3x=−4+−3x(Add -3x to both sides)
−y=−3x−4

(Divide both sides by -1)
y=3x+4
Step: Substitute (3x+4) for y in x+y=0:
x+y=0
x+3x+4=0
4x+4=0(Simplify both sides of the equation)
4x+4+−4=0+−4(Add -4 to both sides)
(Divide both sides by 4)
x=−1
Step: Substitute (−1) for x in y=3x+4:
y=3x+4
y=(3)(−1)+4
y=1(Simplify both sides of the equation)
Answer:
y=1 and x=−1