A truck which has three axles. The rear axle (the undriven one) can be lifted up in order to reduce wear on the tyres while operating under light loads.
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Area 36x4-64x2 and width is 6x2-8x Area = Length * width36x4 -64x2 = L * 6x2 -8x(36x4 -64x2) / (6x2 -8x) = L(36x4 -64x2) / (6x2 -8x) = L((6x2 -8x)2 + 96x3)/ (6x2 -8x) = L1 + 96x3/ (6x2 -8x) = L1 + 96x3/ x(6x -8) = L1 + 96x2/ (6x -8) = L
10x2 - 56 = 88 - 6x2 : 10x2 + 6x2 = 88 + 56 : 16x2 = 144 : x2 = 9 : x = ± 3
6x2 + 14x -12 = (3x - 2) (2x + 6). There they are.
perimeter is 16
7 + 24 ÷ (6x2) =7 + 24 ÷ 12 = 7 + 2 = 9