Question

Solve for x and y : 7x-2y=5xy 8x+7y=15xy

Answer 1

Let,

8x + 7y = 15xy_____(1) and 7x - 2y = 5xy_____(2)

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

16x + 14y = 30xy______(3)

49x - 14y = 35xy_____,(4)

Adding equation (1) & (2)

16x + 14y = 30xy.

+49x - 14y = 35xy

______________

-

-33x = -5xy

-33x/x = -5y

-33 = - 5y

-33/-5=y

33/5=y

y= 6.6

Answer 2

Take a look at the pic!

Hope it helps you friends!❤