Question

2x + y = 35 , 3x + 4 y = 65

Answer 1

Step-by-step explanation:

2x + y = 35 ....(1)

3x + 4y = 65 ....(2)

2 × Eqn(2) − 3 × Eqn (1) we get

6x + 8y − 6x − 3y = 130 − 105

⇒ 5y = 25 or y = 25/5 = 5

Substitute y = 5 in (1) we get

2x + 5 = 35⇒2x = 35 − 5 = 30

or x = 30/2 = 15

∴ x = 15 , y = 5