x+x(akar 2) = 14 X =

x + x ( akar 2 ) = 14
x × ( 1 + akar 2 ) = 14
x = 14 / ( 1 + akar 2 )
x = [ 14 / ( 1 + akar 2 ) ] × [ ( 1 - akar 2 ) / ( 1 - akar 2 ) ]
= 14 ( 1 - akar 2 ) / 1 - 2
= 14 ( 1 - akar 2 ) / - 1
= - 14 ( 1 - akar 2 )