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x = -2
dengan cara
y=x (x2) --> 2y=2x
y=2x-2 y =2x-2
_________-
y = -2
x=y maka x=-2
y=x ;y-2x-2
dit: himpunan penyelesaian.....?
jawab:
y=x *y=x
*y=2x-2 2=x
y=2y-2 x=2
y-2y=-2
-y=-2
y=2
jadi himpunan penyelesaiannya {2,2}
maaf kalo salah