Question

solve the following simultaneous equation using substitution method:
3x - y = 0
2x + y =5

Answer 1

Answer:

your answer will be

X=1

y=1/3

Answer 2

Answer:

x = -5 , y = -15

Step-by-step explanation:

3x - y = 0 ...... (1)

2x - y = 5 ...... (2)

From equation (1), we get,

3x - y = 0

⇒ 3x = y

⇒ x = 3/y ...... (3)

Putting the value of equation (3) in equation (2),

2x - y = 5

⇒ 2(y/3) - y = 5

⇒ 2y - 3y = 15

⇒ -y = 15

⇒ y = -15

Putting the value of y in equation (3),

x = y/3

⇒ x = -15/3

⇒ x = -5