Question

What is the solution to the system of equations y= -3x+6 y=9

Answer 1

Answer:

C. (-1, 9)

Step-by-step explanation:

$\left\{\begin{array}{ccc}y=-3x+6\\y=9\end{array}\right\ \text{put the value of}\ y\ \text{to the first equation}\\\\9=-3x+6\qquad\text{subtract 6 from both sides}\\3=-3x\qquad\text{divide both sides by (-3)}\\-1=x\to x=-1$