Question

7x-15y=2. X+2y=3 by cross multiplication method

Answer 1

Answer:

7x-15y=2___(1)

x+2y=3____(2)×7

________

7x-15y=2

7x+14y=21

_________

y=19

from equation (2)

x+38=3

x=-35

Answer 2

Answer:

7x-15y=2*(2) equation (1)

x+2y=3*(15) equation (2)

on multiplying,both the equation

14x+30y=4

15x+30y=45

-x = -41

x =41

on putting the value of x in both the equation

7x+15y=2

7*41+15y=2

287-15y=2

287-2=15y

285=15y

19=y

x+2y=2

x+2*19=2

x+38=2

38-2= -x

36= -x

x= -36