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6x - 3x = -1 + 31
3x = 30
x = 30/3 = 10
Panjang AD = 2x + 3
= 2(10) + 3
= 20 + 3
= 23 cm (c)
6x - 3x = -1 + 31⇒dibalik -31 menjadi +31
3x = 30⇒agar menjadi x maka dbagi
x = 30/3 = 10
Panjang ad = 2x + 3
= 2(x) + 3
= 2(10) + 3
= 20+3
= c. 23 cm
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