1、3x5=4.830x+25=851.48-2x=66x-12.83=0.06410-3x=1703(x+0.5)=210.5x+8=436x-3x=181.5x+18=3x53-x2=80.273x=0.351.8x=0.972x0.756=909x-40=55+9=2148-27+5x=3110.5+x+21=56x+2x+18=78(200-x)5=30(x-140)70=40.1(x+6)=3.30.44(x-5.6)=1.67(6.5+x)=87.5(27.5-3.5)x=4x+19.8=25.85.6x=33.69.8-x=3.875.6x=12.65x+12.5=32.35(x+8
2、)=102x+3x+10=703(x+3)=50-x+35x+15=603.5-5x=20.37+4x=12.51.5-1.25=0.754x-1.36=2.620-9x=1.26.256x+12.8=15.81502+3x=6902x-20=43x+6=182(2.8+x)=10.4(x-3)2=7.513.2x+9x=33.33x=x+100x+4.8=7.26x+18=483(x+2.1)=10.512x-9x=8.713(x+5)=1692x-97=34.23.4x-48=26.842x+25x=1341.5(x+1.6)=3.62(x-3)=5.865x+7=429x+42.5914
3、.2x+2.5x13410.5x+6.5x=5189x-43x=9.25x-45=1001.2x-0.5x=6.323.4=2x=564x-x=48.64.5x-x=28X-5.7=2.15155X-2X=183X+0.7=53.52=4.2+x261.5=2x+100.516160.2=4x139.25X=0.40316.9X=0.323x=14x14x14x=6535x801.8+6x546.7x60.36.794x402x+8=1623x-14x=14x+7x=89x-3x=66x-8=45x+x=9x-8=6x4/5x=202x-6=127x+7=146x-6=05x+6=112x-8
4、=101/2x-8=4x-5/6=73x+7=283x-7=269x-x=1624x+x=506/7x-8=43x-8=306x+6=123x-3=15x-3x=42x+16=195x+8=1914-6x=815+6x=275-8x=47x+8=159-2x=14+5x=910-x=88x+9=179+6x=14x+9x=4+72x+9=178-4x=66x-7=127x-9=8x-56=18-7x=1x-30=126x-21=216x-3=69x=184x-18=135x+9=116-2x=11x+4+8=237x-12=83X0.7=52=4.2x1.5=2x9.25X=0.403X0.5
5、=2.61.8-6x540.2x0.40.53.79.4x0.4x16.2124x201/3x5/6x1.412x34x=118x14x=1223x514=141234x=562214x=122 2(X+X+0.5)=9.8 25000+x=6x 3200=450+5X+X X-0.8X=6 12x-8x=4.8 7.5*2X=15 1.2x=81.6 x+5.6=9.4 x-0.7x=3.6 x 1.3 X+8.3=10.7 15x 3 3x816 7(x-2)=2x+3 18(x-2)=270 12x=300-4x 7x+5.3=7.4 5=4.8 x+25=85 8-2x=6 3=0.0
6、6 410-3x=170 3(x+0.5)=21 0.5x+8=43 6x-3x=18 1.5x+18=3x 2=8 x=0.35 1.8x=0.972 0.756=90 9x-40=5 5+9=21 48-27+5x=31 10.5+x+21=56 x+2x+18=78 5=30 70=4 0.4 4(x-5.6)=1.6 7(6.5+x)=87.5 x=4 4x=440 2.1x=16.8 用字母表示数:(1)甲数是3.5,比乙数多a,乙数是,甲.乙两数的和是.(2)用a元买了单价为1.8元的西瓜2千克,应找回元.(3)比x少5的数与a相乘的积是.(4)a的5倍减去4.8的差是.(5)a与b的和的一半是.(6)食堂买来a千克大米,吃了b千克,还剩千克.(7)买20支钢笔共付c元,每支钢笔的价格是元.(8)一个工地用汽车运土,每辆车运x吨.一天上午运了6车,下昼运了5车.这一天共运土( )吨,上午比下昼多运土( )吨.(9)商场上午卖出电视机10台,下昼又卖了7台,每台电视机A元.全天共卖电视机一共收入( )元,上午比下昼卖电视机少收入( )元.
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