Question

the lines 3x + 4x +9 = 0 and 4x -3y +2 = 0 are mannually

Answer 1

Step-by-step explanation:

7x+0y+9=0

4x-3y+2=0

-__+__-__-___

3x +3y+7 =0

_________

3(x+y)=-7

x+y= -7/3

x+y= -2.3

Answer 2

Step-by-step explanation:

x = -(4y + 9)/3

x = (3y - 2)/4

4(-4y - 9) = 3(3y - 2)

-16y - 36 = 9y - 6

-25y = 30

y = -6/5

Put the value of y in any of the equation you will the value of x also