答案：x=66y=95(9)97x+24y=720258x-y=2900答案：x=50y=98(10)42x+85y=636263x-y=1638答案：x=26y=62(11)85x-92y=-251827x-y=486答案：x=18y=44(12)79x+40y=241956x...

【答案】解:去分母得:3x-(x+2)=0解得:x=1检验x=1是原方程的增根所以,原方程无解9.(2010江苏无锡)(1)解方程:;【答案】解:(1)由原方程,得2(x+3)=3x,∴x=6.经检验,x=6是原方程的解,∴原方程的解是...

2(x-2)-3(4x-1)=9(1-x)11x+-2x=100-9x15-(8-5x)=7x+(4-3x)3(x-7)-2[9-4(2-x)]=223/2[2/3(1/4x-1)-2]-x=22(x-2)+2=x+15x^2+3x+1=07x^2+x+12=02x^2+4x+4...

x-x/2+1/2=2-x/3+2/3x/2+x/3=2+2/3-1/25x/6=13/6x=13/52、(x-1)/2-(2x-7)/6=(4x-5)/3-1x/2-1/2-x/3+7/6=4x/3-5/3-17/6-1/2+1+5/3=4x/3+x/3-x/210/3=...

3x+y=342.9x+4y=358x+3y=303.7x+2y=527x+4y=624.4x+6y=549x+2y=875.2x+y=72x+5y=196.x+2y=213x+5y=567.5x+7y=525x+2y=228.5x+5y=657x+7y=2039.8x+4y=56x+4y=21...

解:10x=293-93x=200/10x=20题:10x+94=294解:10x=294-94x=200/10x=20题:10x+95=295解:10x=295-95x=200/10x=20题:10x+96=296解:10x=296-96x=200/10...

解：80y-80x=400、所以x=0、y=5。4、[x-4*（18-x-y)/60]/4=（18-y）/60。解：y/4=（18-x）/60+（18-x-y）/60、所以x=2y=2。5、x=4y。解：3x+11-x-y=25、x=8、y=2。6...

7.11x+-2x=100-9x8.15-(8-5x)=7x+(4-3x)9.3(x-7)-2[9-4(2-x)]=2210.3/2[2/3(1/4x-1)-2]-x=211.5x+1-2x=3x-212.3y-4=2y+113.87X*13=514.7Z/93=4115.15X+863-65X=...

374x=360+587这样出就行50X=60（X-3)50X=60X-180180=10XX=180

3X+5X=4814X-8X=126*5+2X=4420X-50=5028+6X=8832-22X=1024-3X=310X*（5+1）=6099X=100-XX+3=18X-6=1256-2X=204y+2=6x+32=763x+6=1816+8x=402x-8=84x-3*9=29...