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2 2X + -570%X + 20%X = 3.6XX 1=20 x -5425% + 10X =X - 15%X = 68X+ 3X= 12185X21-X-丄=1236X+ 5 =13.43 -X43X=X- 2 = -716X + - X=824X - 6X - =23123T 十 X=1025728 X = 丄x些9 651X + - = 26 X 134x 3 X 9 = 29丄 x + 丄 x = 4354525263 X 21 X 2 =41036X+ 5 =13.4舟 X-3 X=;304x 6= 385310人5X=19邑2115.415 5285 x= 75-x=丄 X 169651X + 6 = 26 +13X-0.25= 1x =30%354525444+0.7X=1022 X+ 1 X =42X+1 X=105324X- 3 X=400X-0.125X=836.38X43X+二 X=18X1313X (+ -)=-68 12x - 0.375x=-76x X - + -=4X3238X - 3X = 1275 X - 2.4 X 5 = 830.36 X 5- - x =43 (x-4.5) = 712 x- 25%x = 10x- 0.8x = 16+620 x-8.5= 1.54x-匚 x -4= 215X + 25%X=90X - 7 X=