Question

solve 5x - 4y + 8 = 0 and 7x + 6y -9=0 for x and y​

Answer 1

5x - 4y + 8 = 0 (1)

7x + 6y - 9 = 0 (2)

By elimination method

Multiply equation (1) & (2) by 6 and 4 respectively

30x - 24y + 48 = 0 (3)

28x + 24y - 36 = 0 (4)

By adding equation (3) and (4) we get,

2x + 12

2x = - 12

x = -12

2

x = -6

Putting the value of X in equation (1)

5(-6) - 4y + 8 = 0

- 30 - 4y + 8 = 0

- 4y = 30 - 8

- 4y = 22

y = 22

-4

y = - 5.5

The value of X = -6

The value of Y = - 5.5

ANSWER