Question

Y

=
–3x + 6
y
=
9
What is the solution to the system of equations?
(–21, 9)
(9, –21)
(–1, 9)
(9, –1)

Answer 1

(-1,9) is correct in edg2020

Explanation:

Answer 2

(-1, 9)

Explanation:

`\left\{\begin{array}{ccc}y=-3x+6\\y=9\end{array}\right\\\\\text{Put the value of y 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`