Question

5x +3y =9 ___(1) 2x -3y =12 ___(2)

Answer 1

On add eq 2 from eq 1
Than 3y would cancelled
7x= 21
X=3
Put these value in eq 1

Answer 2

Sol: 5x+3y=9..(1)

2x-3y=12..(2)

Adding eq (1) and eq (2), we get

+ 5x+3y=9..(1)

2x-3y=12..(2)

________________________

7x. = 21

x. = 21/7

X. = 3

Putting x=3 in eq (1)

5(3)+3y=9

15 + 3y= 9

3y=9-15

3y= -6

y=-6/3

y=-2