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T.tengah- T.bawah1 T.tengah- T.bawah2
a.
180/18 = 90/x+30
180x + 5400 = 1620
180x = 5400-1620
180x = 3780
x = 3780/180
x = 21
b.
90/35 = 180/x-32
90x - 2880 = 6300
90x = 6300 + 2880
90x = 9180
x = 9180/90
x = 102
T.tengah- T.bawah1 T.tengah- T.bawah2
a.
180/18 = 90/x+30
180x + 5400 = 1620
180x = 5400-1620
180x = 3780
x = 3780/180
x = 21
b.
90/35 = 180/x-32
90x - 2880 = 6300
90x = 6300 + 2880
90x = 9180
x = 9180/90
x = 102