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320=45+6XX-0.6X=8x+8.6=9.4522x=1513Fx=1.3X+8.3=19.715x=303x+9=367(x-2)=73x+9=1218(x-2)=2712x=320+4x5.37+x=7.4715三3x=530三x=851.8+2x=6420-3x=1703(x+5)=185(x+5)=100x+3x=703(x+3)=501.8+2x=6420-3x=1703(x+5)=180.5x+9=406x+3x=361.5x+6=3x5X3-x=840-8x=5xF5=2148-20+5x=31x+2x+8=80200-xF5=3070Fx=445.6-3x=1.69.8-2x=3.85(x+5)=100x+3x=703(x+3)=50二、提高类方程。4(4x1)=3(22x)5(x-8)=3x(22-x+2=68x7(x+2)=5x+60(20-8x)三3=2x+l12三8x=37(2x-6)=847x-7=6x+48x-6x+30=12x+15240三(x-7)=30(6x-40)F8=5x-8(21+4x)X2=10x+148x-15X6=3x-20(2x+7)X2=4x+14