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29 = 3x + 5x - 2 + 2x + 1
29 = 10x -1
29 + 1 = 10x -1 + 1
30 = 10x
1/10 x 30 = 1/10 x 10x
3 = x
sisi a
3x = 3 x 3 = 9 cm
sisi b
(5x-2) = (5 x 3) - 2 = 15 - 2 = 13 cm
sisi c(TERPENDEK)
2x +1 = ( 2 x 3) +1 = 6 + 1 = 7 cm