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6x - 7 = 25
6x = 32
x = 32/6 = 16/3
panjang sisi terpendek 3x - 10 = 3(16/3) - 10
= 16 - 10
= 6 cm
6x-5=25
6x=30
x=5 cm.
jadi,sisi terpendeknya adalah
3x-10=3x5-10
=15-10
=5 cm.