Only number 4, and please include the working. also do it with the substitution method not elimination or any other.

Question

asked Jun 22, 2022 115k views

1 Answer

Jlchereau · Answer 1 · 2022-06-27T19:54:09+0000

Answer:

x = -2 and y = 1

Explanation:

→ Rearrange x - y = -3 to make y the subject

-y = - x - 3 so y = x + 3

→ Substitute into 2x + y = -3

2x + x + 3 = -3

→ Simplify

3x + 3 = -3

→ Minus 3 from both sides

3x = -6

→ Divide both sides by 3

x = -2

→ Substitute x value into first equation

-4 + y = -3

→ Add -4 to both sides

y = 1