. if x + y =12, x - y = 2 find x + 2y.
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x+y=12 -----(1)
x-y=2-------(2)
adding (1) and (2) we get
x+y+x-y=12+2
= 2x=14
=x=14/7
=x=2
putting the value of x in (1) we get
2+y=12
=y=12-2
=y=10
putting the value of x and y in x+2y, we get
2+2×10=2+20=22
x-y=2-------(2)
adding (1) and (2) we get
x+y+x-y=12+2
= 2x=14
=x=14/7
=x=2
putting the value of x in (1) we get
2+y=12
=y=12-2
=y=10
putting the value of x and y in x+2y, we get
2+2×10=2+20=22
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