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4 { (x + 5) + (x - 2) + x} = 156
4 { 3x + 3} = 156
12x + 12 = 156
12x = 144
x = 12 cm
4 (x+5) + 4 (x-2) + 4 (x)
4x + 20 + 4x - 8 + 4x
12x +12
b. Kell = 12x +12 <= 156
12x <= 156 -12
12 x <= 144
x <= 144/12
x = 12
Jadi p = 17, l = 10, t = 12
Mungkin gitu ka