Question

Does anyone know this?

Answer 1

x=2;y=12

Explanation:

2x+3y=40.....(1)

-2x+2y=20.....(2)

now,

(1)+(2)=>

5y=60

=>y=12

(1)=>

2x=40-3y

=>2x=40-36

=>x=2

Answer 2

Solve the following system of equations:

2x + 3y = 40

-2x + 2y = 20

We can add these equations to get a new equation. Then we can solve for y:

0 + 5y = 60

5y = 60

y = 12

2x + 3y = 40, plug in y = 12 and solve for x:

2x + 36 = 40

2x = 4

x = 2

Choice A