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0.6(x-0.6)=0.6 8x(1.8+3)=1.5 x+ x=75 x+ 50%x=35 x+x=1.4 x+0.8=1.7 x-1.4=1.6 4x-6.2=3.8 x+50% x=60 x4x9.2 2x+1.42=3.7 10x=45 52x =152 x=40 75%x28% x16.92 70% x25.839.8 x20% x120 x75% x180 x60%50 （120%）x7.2 91x =1.34 0.1637x=0.13 5x+3x=12.8 (x+5)42=50 4x+7.1=12.5-2x3(x+2)=4(x+1) 8(x1.5)=x+0.6 2.5x+x=10.5 4.85x =13.8 25+ x =6x x =1 3200x =5x+450 x5+7=23 91x=130% 130%82 x=518（x2）=270 120% x =340%x 30x+25=85 60% x12.83=0.06（x+）3=21 63x2=7 0.273x=35% （x26）7=50% x6=3.320% +x =54 x=13 50%x5=20%x+10 = X：= ：X=40 = X:15=13: 56 34 ：X= 54 ：2 X ：0.75 = 81.25
