Question

Question is depicted below:

Answer 1

Answer:

(-2, 6)

Step-by-step explanation:

10x + 10y = 40 -(1)

5x + 3y = 8 -(2)

(1) =>        10x + 10y = 40

(2) x 2 => 10x +  6y = 16

=> 4y = 24

=> y = 6

5x + 3(6) = 8

5x = -10

x = -2

Solution = (-2, 6)

Answer 2

Solution:

Solve the system of equations to find the value of y.

• 10x + 10y = 40

        5x + 3y = 8

• 10x + 10y = 40

        2(5x + 3y = 8)

• 10x + 10y = 40

        10x + 6y = 16

• 4y = 24
• y = 6

Substitute the value of y into any equation to find the value of x.

• 10x + 10y = 40
• => 10x + 10(6) = 40
• => 10x + 60 = 40
• => 10x = -20
• => x = -2

Putting them in (x,y) form.

• (x,y) ⇒ (x = -2,y = 6) ⇒ (-2,6)