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223 3X, X= 2X + = 70%X + 20%X = 3.67554
1232581631 X = X = × ?X= 5105729651
314X×=20× 25% + 10X = X - 15%X = 68 545
2613611X? =× 4x,3 ×9 = 29 x + x = 435452526
31321X,,6X,5 =13.4 X?=12 132448342(x,2.6),8X,21×=4 x,x,201034
27732 X?= X,X= 4X,6×=2 716843
213 6X,5 =13.4 X- X= 4χ,6,385310
3363X=400 X-0.125X=8 = X- 8X4 151584435X= X= X?= 3X=8192115528
31313 5X+ X=18 X×( + )= x,0.375x= 768126
2538116X1X= X=× =30% X-0.25= 572965144
3213x×+=4× X,X,12 5 X,2.4×5,83287
38 26136X?=? X,25%X=90 X, X= 79354525
3321 0.36×5- x = (x- 4.5) = 7 x- 25%x = 104532
2114+0.7X=102 X+X=42 X+X=105 324
4
x- 0.8x = 16+6 20 x– 8.5= 1.5 x- x -4= 21 5