Question

Solve the system of equations.

Answer 1

Answer:

(C) (2,-1)

Step-by-step explanation:

The given system of equations is :

$5x+y=9$                            (1)

and $3x+2y=4$                  (2)  

Multiply equation (1) with 2 and then subtract equation (2) from it, we get

⇒$10x+2y-3x-2y=18-4$

⇒$7x=14$

⇒$x=2$

Substitute the value of x=2 in equation (1), we get

⇒$5(2)+y=9$

⇒$10+y=9$

⇒$y=-1$

Therefore, x=2 and y=-1. that is (2,-1).

Answer 2

You can find  replcing x and y by the coordinates of the points
A : 5.-2 + 5 ≠9 not solution
B : 5.1 + 4 = 9 so 3.1 + 2.4 = 11 ≠4 not solution
C: 5.2 +  = 9  so 3.2 + 2.-1 = 4 both are right then C is solution
D: 5.4 - 4 = 16 ≠ 9 not solution