x + 2y + 9 = 0 , 8x + 4y + 17 = 0
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Answered by
2
Answer:
x=1/6 , y = -55/12
Step-by-step explanation:
x+2y+9=0 ----------1
8x+4y+17=0
==multiply 1 by 2
2x+4y+18=0 ------------2
8x+4y+17=0 ----------3
subtract 2 and 3
we get
-6x+1=0
-6x=-1
6x=1
x=1/6 -----------4
substituting x in 1
1/6 + 2y+9=0
1/6 +2y =-9
(1+12y)/6 = -9
1+12y= -54
12y = -54-1
12y =-55
y = -55/12
Answered by
19
x+ 2y +9=0
8x+4y+17=0
now,
x+2y=-9 ------1
and ,
8x+4y =-17 -------2
multiply the eqń ----1 by 2
we get,
2x+4y =-18 ------3
now, eqń 3 minus eqñ2
we get ,
6x =1
x = 1/6
putting the value of x =1/6 in eqń 3
we get,
2×1/6+4y=-18
1/3+4y=-18
-4y =1/3+18/1
take LCM.
-4y =55/3
y = -55/12.
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