1、解方程答案例1【答案】x=3【解析】6x-3=156x-3+3=15+36x=186x *6=18*6x=3例2【答案】x=1【解析】2x+9x=11(2+9)x=1111x=11x=1例3【答案】x=例4【答案】x=56【解析】16.8*x=30%0.3x=16.80.3x -0.3=16.8*).3x=56例5【答案】x=10【解析】6.7x60.3=6.7x60.3+60.3=6.7+60.36.7x=676.7x -6.7=67 -6.7x=10例6【答案】x=50【解析】(200-x)*5=30(200-x)*5X5=30X5200-x=150 x+150=200 x+150-150

2、=200-150 x=500.2x +0.2=6 +0.2例7【答案】x=【答案】x=【答案】x=4例10【答案】x=A檔（鞏固專練）1【答案】x=44【解析】x+32=76x+32-32=76-32x=442【答案】x=2【解析】15x=3015x-15=30-15x=23【答案】x=6【解析】3x+9=273x+9-9=27-93x=183x-3=18-3x=64【答案】x=5【解析】9x-40=59x-40+40=5+409x=459x-9=459 x=55【答案】x=30【解析】x-0.8x=6(1-0.8)x=60.2x=6x=306【答案】x=7【答案】x=648【答案】x=809

3、【答案】x=10【答案】x=711【答案】x=12【答案】x=4B檔（提升精練）1【答案】x=2【解析】23x-14x=18(23-14)x=189x=189x*9=18*9x=22【答案】x=1【解析】99 x =100- x99x+x=100(99+1)x=100100 x=100 x=13【答案】x=14.5【解析】26X1.5=2x+102x+10=392x+10-10=39-102x=292x*2=29*2x=14.54【答案】x=20.2x +0.2=6 +0.2【解析】4X8+2x=362x+32=3611【答案】x=42x+32-32=36-322x=4x=25【答案】x=2【

4、解析】53x-90=1653x-90+90=16+9053x=10653x-53=106-53x=26【答案】y=1【解析】90y-90=90-90y90y+90y=90+90180y=180180y-180=180-180y=17【答案】x=1【解析】32-22 x =1022x=32-1022x-22=22-22x=18【答案】x=4【解析】88-4x=80-2x88-4x+4x=80-2x+4x88=2x+8088-80=2x+80-808=2x2x-2=8-2x=4【答案】x=10【答案】x=12【答案】x=C檔（跨越導練）1【答案】x=60【解析】x+5+9=21x+5+9-9=21

5、-9x+5=12x+5X5=12X5x=602【答案】x=0.78【解析】0.273+x=0.350.35x=0.2730.35x+0.35=0.273-0.35x=0.783【答案】x=11【解析】3(x+3)=50-x+33x+9=53-x3x+x+9-9=53-9-x+x4x=44x=114【答案】x=130【解析】150X2+3x=690300+3x-300=690-3003x=3903x+3=390+3x=1305【答案】x=1【解析】45x-50=40-45x45x-50+45x+50=40-45x+45x+5090 x=9090 x+90=90+90 x=16【答案】x=1.2【解析】0.5X16-16X0.2=4x8-3.2=4x4x=4.84x*4=4.8*4x=1.27【答案】x=2.2【解析】2(x+x+0.5)=9.82x+0.5=4.92x+0.5-0.5=4.9-0.5 2x=4.4 2x*2=4.4*2 x=2.2【解析】(0.5+x)+x=9.8*