Question

What is the solution to the system of equations below?

3x + 4y = -2
2x – 4y = -8
A
B
x = 2, y = -2
x = 6, y = -5
Cx=
= 4, y = 4
D
x= -2, y = 1

Answer 1

x = -2, y = 1

Step-by-step explanation:

Finding X:

3x + 4y = -2

2x - 4y = -8

5x = -10

5x/5 = -10/5

x = -2

Why: Using the elimination method, you can eliminate 4y and -4y since they are opposites. Then its an addition problem; 3x plus 2x is 5x. -2 plus -8 is -10. From there it's "junk and divide"

Finding Y:

2(-2) - 4y = -8

-4 -4y = -8

+4 +4

-4y = -4

-4y/-4 = -4/-4

y = 1

Why: Because you found that x = -2, you can then plug it in one of the equations. From there its simple "junk and divide". Hope this helps this took a long time to type lol.