Contoh Soal :
1) Jika ukuran SXT = (3x-4), ukuran RXS = (2x+5) dan ukuran RXT = 111. tentukan ukuran RXS ?
Jawab : RXS = 111 = (2x+5) + (3x-4)
111 = (2x + 3x) + (5-4)
111 = 5x + 1
111-1 = 5x
110 = 5x
x = 110 : 5
x = 22
RXS = (2x+5)
= (2.22+5)
= 44+5
= 49
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