Question

Solve the linear system.

x + y = -3

y = 2x

Answer 1

x = -1

y = -2

Explanation:

You can use the method of substitution to solve this equation. Since you know that y= 2x, you can substitute that value into x + y = -3:

x + (2x) = -3

Combine like terms:

3x = -3

x = -3/3

x = -1

Now that you know the value of x, you can substitute it into any of the two equations (I'll be choosing y = 2x)

y = 2x

y = 2 (-1)

y = -2

So your solution is x = -1, y = -2

Point form: (-1, -2)