tolong jawb soal nya ya dikumpulkan besok ditunggu.maksih

Kesebangunan dan Kongruen

No.1
20 = (15 x 12)+(X x 6) : (12 + 6)
20 = 180 + 6X : 18
20 x 18 = 180 + 6X
360 = 180 + 6X
360 - 180 = 6X
180 = 6X
X = 180/6
X = 30

No.2
10 = (6 x X)+(12 x 4) : (4 + X)
10 = 6X + 48 : (4 + X)
10 (4 + X) = 6X + 48
40 + 10X = 6X + 48
10X - 6X = 48 - 40
4X = 8
X = 8/4
X = 2

*semoga membantu. sukses selalu ^_^