Question

I need help with question 12Solve the system by substitutiony = - 3x - 10 y = - 1

Answer 1

x = 3 and y = -1

Step-by-step explanation:

The first equation of the system is:

y = - 3x - 10

The second equation of the system is:

y = -1

The second equation is solved for y, so we can take the second equation and replace the value of y in the first equation as follows:

y = - 3x - 10

-1 = - 3x - 10

Now, we can solve for x, so adding 10 to both sides of the equation, we get:

-1 + 10 = -3x - 10 + 10

9 = - 3x

Dividing by -3 into both sides:

`\begin{gathered} (9)/(-3)=(-3x)/(-3) \\ -3=x \end{gathered}`

Therefore, the solution of the system is x = -3 and y = -1