Question

solve question no. 12​

Answer 1

Answer:

7x-10y-4=0. ---(1)×12

12x+18y-1=0----(2)×7

84x-120y-48=0

84x-126y-7=0

-. +. +

________________

6y =-41

So y=-41/6

SUBSTITUTING THE VALUE OF Y-

7x-10×(-41/6)=4

7x=4+205/3

7x=12+205/3

SO VALUE OF X= 31/3,y=-41/6

Now 4x+6y USING THE VALUE OF Y =-41/6 AND X=31/3--

4x+6(-41/6)

X=41/4OR 4(31/3)+6y=0

y=-124/3×6

y=62/9

NOW 8(-41/3)-x

x=-328/3

OR 8y-31/3

y=31/24

Answer 2

Answer:

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