(iv) 3х – бу = 4
9x - 2y = 7.
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Explanation:
3(3x-6y=4)
9x-18y=12.............(eq 3 )
9x-18y=12
- 9x-2y=7
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-16y=5
y = 5 / 16
3x - 6 ( 5/16)=4
3x - 30/96=4
3x-30=4 x 96
3x - 30=384
3x= 364
x = 121.33
3(121.33) - 6 y = 4
364-6y=4
-6y=4-364
-6y=-360
y=60
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