Question

3x+y+1=0 and 3x-3y+8=0
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Answer 1

Answer:

-11/12 ; 7/4

Step-by-step explanation:

3x+y=-1             (a)

3x-3y=-8           (b)

subtracting b from a

3x+y-3x+3y=-1+8

4y=7

y=7/4

x=-11/12

Answer 2

Answer:

Step-by-step explanation:

3x+y+1=0   ,    3x-3y+8=0

3x+y=-1      ,    3x-3y= -8

on adding,

3x+y=-1

3x-3y= -8

-2y = -9

y = 9/2

now,

3x+y=-1  

3x = -1 -y

3x = -1 - 9/2

3x= -2-9/2

3x= -11/2

x = -11/3*2

x= -11 / 6