Question

Solve the system of equations - X - Y = 3 and 6x + 2y = -30 by
combining the equations

Answer 1

X= -6, Y= 3

Explanation:

1)

- X - Y = 3

- X - 3= Y

Y= - X - 3

2)

6X + 2Y = -30

3X + Y = -15

Y = -15 - 3X

3) Combine

- X- 3 = - 15 - 3X

- X = -15 - 3X +3

-X + 3X = - 12

2X = - 12

X= - 6

4)

- X-Y=3

-(-6) - Y = 3

-Y= 3-6

-Y= - 3

Y = 3

Answer: X= -6, Y= 3

{

6x + 2y = -30, 6(-6)+2(3)= -30

}