0.75x+0.45(18-x)=12

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/25 02:25:22
0.75x+0.45(18-x)=120.75x+0.45(18-x)=120.75x+0.45(18-x)=12解0.75x+0.45*18-0.45x=120.75x+8.1-0.45x=120.

0.75x+0.45(18-x)=12
0.75x+0.45(18-x)=12

0.75x+0.45(18-x)=12

0.75x+0.45*18-0.45x=12
0.75x+8.1-0.45x=12
0.75x-0.45x=12-8.1
0.3x=3.9
x=13

0.75x+0.45(18-x)=12 4.2-0.6x=3.6x 5x+2x=33.6 7x-4x=0.75 2x+7x+2.1=12 56x-32x-119=361 x+5=2x 3x+9=6x 4x-28=2x 2x+18=7x 5x=25*4-15x 7x-x+2*3=29.4 (28.8+5.5x+3.2)除2=71 12x*2=18*(28-x) 求X?12x*2=18*(28-x)求X? 解方程:(1)x-0.75x=12(2)2.8x+x=7.6(3)2.36x+2.64x=18(4)3.5x-1.5x=10.8 解方程 3.5 X—1.5 X=10.8 2.36 X+2.64 X=18 X—0.75 x=12 2.8 X+ X=7.6 、 12x(x+x)=60 X=? (x-1)(x-2)=0 (2x-1)²=9 x²-7x+6=0 x(x-1)=x 2x²-5x-12=0 2(x-1=(x-1)(x-2)=0 (2x-1)²=9 x²-7x+6=0 x(x-1)=x 2x²-5x-12=0 2(x-1=(x-1)(x-2) 2x²+3x-18=0 3x²+2x-5=0 x²-4x-7=0.解一元二 请问,这十道关于一元一次方程的题目我做对了吗?(1)2X+3X+4X=189X=18X=2(2)13X-15X+X=-3-1X=-3X=3(3)2.5X+10X-6X=15-21.56.5X=6.5X=1(4)4X+3(2X-3))=12-(X+4)4X+6X-9=12X-4810X-12X=-48+9-2X=-57X=28.5(5) 7X+2(3X-3)=207X+6X-6=2013X=20+6 matlab解数值分析题p=(x-1)*(x-2)*(x-3)*(x-4)*(x-5)*(x-6)*(x-7)*(x-8)*(x-9)*(x-10)*(x-11)*(x-12)*(x-13)*(x-14)*(x-15)*(x-16)*(x-17)*(x-18)*(x-19)*(x-20)解为1,2,3……,20取多个非常小的数用软件工具求解方程p(x)+n*x^19=0,并 x^:12=x:(7-x) x^:12=x:(7-x) (x+x)+(x-x)+(x/x)=11.2 8x-5.5x=7.57.2x÷3.6=2 3x+6x-8x=0.7 12x-2x-5x=4.512x-x=0 5x+x=1.8 3.2x+1.8x=64.8x-0.8x=6 6.3-0.3x=9.6 8.6x-8.5x=0.720x-2x=36 9x+6x=4.5 18x-12x=5.42x-1.6x=3.6 18x+3x=7×6 1.2x-0.5x=0.71.3x+2.7x=1 4x-3.2x=6.4 0.8x+3.2x+3x=562.8x-2x=7.2 解方程(2x-3/x)^2+5+12x=18/x (2x-3/x)^2+5+12x=18/x (2x-3/x)^2+5+12x=18/x 解方程(组)(2x-3/x)²+5+12x=18/x 我是这样算的,化简x(x-1)+2x(x+1)-3x(2x-5)=x²-x+2x²+2x-6x²+15x=x+2x²-6x²+15x=18x+2x²-6x²=12x²-6x²可以相减吗,还是我算的不对了?(详细些看不懂耶!) (x+30)*(x-18)=x*x