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L = ½ × d1 × d2
81 = ½ × 18 × (2x + 3)
81 = 9 × (2x + 3)
81/9 = 2x + 3
9 = 2x + 3
2x = 9 - 3
2x = 6
x = 6/2
x = 3
Jadi nilai x adalah 3
[answer.2.content]
L = ½ × d1 × d2
81 = ½ × 18 × (2x + 3)
81 = 9 × (2x + 3)
81/9 = 2x + 3
9 = 2x + 3
2x = 9 - 3
2x = 6
x = 6/2
x = 3
Jadi nilai x adalah 3
[answer.2.content]