Question

5x+2y = 15
7x+3y= 17

Answer 1

Answer:

we get x=11 & y=-20

Step-by-step explanation:

GIVEN  5x + 2y = 15----------(1)

             7x + 3y = 17----------(2)

multiply equation (1) by 7 and equation (2) by 5

we get, 35x + 14y = 105------(1)

            35x + 15y = 85--------(2)

                           -y = 20

                         ⇒y= -20

put y in equation (1) or (2),

             35x - 280 = 105

             35x = 105 + 280

             35x =  385

             ⇒x= 385/35 = 11

there fore,we get x=11 & y=-20