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9x - 2 = 43
9x = 43 + 2
9x = 45
x = 45/9 = 5
⇒ 2x = 2(5) = 10 cm (terpendek)
⇒ 3x + 1 = 3(5) + 1 = 15 + 1 = 16 cm
⇒ 4x - 3 = 4(5) - 3 = 20 - 3 = 17 cm
43 = 9x + (-2)
43 + 2 = 9x
45 = 9x
5 = x
-> 2X = 2 x 5
= 10
-> 3X+1 = 3 x 5 + 1
= 15 + 1
= 16
-> 4X-3 = 4 x 5 - 3
= 20-3
= 17
Sisi terpendek = 10