Question

Solve the linear system below by substitution

x=-3y+1

3x+9y=-4

(A). (3,-4)
(B). (2,9)
(C). IMS (Infinitely Many Solutions)
(D). No Solution​

Answer 1

Option D

Explanation:

x = -3y + 1

3x + 9y = -4

Substitute x;

3(-3y + 1) + 9y = -4

Distribute;

-9y + 3 + 9y = -4

3 ≠ -4

No solution