1.

7. y - 2x = 74y + x = 1​

Answer»

i) y-2x = 7. And. II) 4y+X = 1

i) y=7+2x

Now replacing y by its value in (ii)

4(7+2x)+x = 1

28+8x+x = 1

28+9x = 1

9x = 1-28

9x = -27

x=-27/9

x=−3

Now y will be ;

4y + (-3) = 1

4y-3=1

4y=4

y=1


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