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30= 2(2x-3) + 2(x-1)
30= 4x - 6 + 2x - 2
30= 6x - 8
30 + 8 = 6x
38 = 6x
x = 38/6
x= 19/3
panjang sisi1
= 2x - 3
= 2x19/3 - 3
= 38/3 -3
= 38/3 - 9/3
= 29/3
panjanng sisi2
= x - 1
= 19/3 - 1
= 19/3 - 3/3
= 16/3