七上解一元一次方程100道练习题有答案

1、2x+l=75x-2=83.3x+3=2x+7x+5=3工一71lx-2=4x-94.x-9=4x+2736i(x-l)=2丄(x+2)25丄(卄14)=l(x+20)5.丄x=丄卄36.243774丄(x+15)=l-l(x-7)523387.8.=lx+622x+6=l13x=394247x-5_34081Ox3=99.5x2=7x+810.-x=3x-2212.4x2=3x7x+2=2x4X=x+115.52x-l=-+216.334(x+0.5)+x=717.2(x1)=418.5(x1)=119.2-(1-x)=-220.1lx+l=5(2x+l)21.4x-3(20-x)=35(x

2、+8)-5=022.2(3-X)=9-3(x+3)=2424.-2(x-2)=1212(2一3x)二Lr+426.276-3(x+-)=-27.3328.2(200-15%)=70+25兀3(2x+l)=1229.x+2x542x5x+l-641丄口26ix-i(3-2x)=1522x+l5x1(43-=136丄(2x+14)=4-2x732945(2004x)(300 x)=300 x1010258(3x-l)-9(5x-l1)-2(2x-7)=30461,111一卄一=-X23450.5Al_0.1x+2_i0.20.3x1x+249oTrr=i2502x+I=x+420.8x0.1=0.

3、5x0.71X_4=2X+3-|X533x+17+x546一x-lx+12x+331.3xx+4-1=+-4-6300hx+1)=l(2x-3)32.37-(x+1)=-(x1)432x1x+2=-1沪+1)+2J冬562323257332358.丄(2x+3)+1(2x+4)=1(2x+5)+1(2x+6)59.23455.Y+2=7A882.+4)+6+8=19X7l533x=2x+52y+3=y-l60.7(2x一1)一3(4%一1)+2(3兀一2)+1=061.5.r-l76=3Z(2y-l)+l(l-2y)=|(2y-l)2x-lx+217y=43y_1-y=-5385.10 x+7

4、=12x53x8x-4+2x二4x32(3x+4)=6-5(x-7)63.6需(21)一2卜=264.X65.12-x-l)-8=-x+l4324266.5127x12(-x-)=8-(6x-9)67.323X_2-18X=X+268.6969.(x+l)x30%+(100-x)x25%=lx70.2一3x5+x4111)71.4_32丿+3+52(2x-l)-4(4x-l)-5(2x+l)-19=072.3xl.3x+5JV-4-173.-1=-2340.5620.4X+0.90.1A0.03+0?74.050202x|l|(lx+l)+2J-2i=|0X)375.234(5x-l)-8-2

5、0-7=l76.2-5+3)二92(x+3)-2(x+l)-5=077.2(x+3)让x+2x27&79.80.x2x-4.5x+1289.=1-23690.x-2x+34+x(x5)+92.93.0.50.20.11-xx+294.0.4y+0.9y50.3+95.0.30.2y051196.3(x+2)-(2X-3)=2(2X-3)-7(X+2)111197.亍亍三(x-2)-2-2=098.5(y+8)-5=4(2y-7)3x一-=16-一-99.3262x-3x+4-=1.60.150.223“3、2-3xx3236j001.88A1.33X5A0.4?1.22032x=3x=2x=4

6、x=675.3x=-12x=4x二-329.5.V=7-210.6?Y=-511.x=-512.1235.xx=3x二-2838.516X=51340.x=1441.x二T2042.x325x=43.1244.x=-3745.答案67.8A=-968.3A=-569.22530506x=-=-73570.16V=2571.x=872.x二T73.x二-374.x=975.18X=TX=1X二-80?f101.x=一3x=-878.313.X=114.2X=315.53X=1X=1x二T619.x=-5x=-3x=4x=9x二-724.346.A=21647.x=348.32A=1549.64-v=132950.v=2x=2x=-2x=7x=1x=-5156.x=3-3二一一252980.X=1x=5y=42y=-585.5y=-6x=121二一6x=3X289.757.x=x=-25.x二-1126.x=-47190.21727.1228.10929.x=63x=-30.231.x=832.