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解下列方程:0.5分之0.4x 2.1?

0.5分之0.4x+2.1-0.03分之0.5-0.2x=5分之3(0.4x+2.1)/0.5 - (0.5-0.2x)/0.03=3/56(0.4x+2.1) - 100(0.5-0.2x)=9/52.4x+12.6 -50+20x=1.822.4x=39.2x=1.75我的答案是正确的,你自己可以验证.

解:依题意2113得方程,0.5分之52614102(0.4x+2.1)-0.03分之(0.05-0.02x)=0.62*(16530.4x+2.1)-3分之内100*(0.05-0.02x)=0.62*(0.4x+2.1)-3分之(5-2x)=0.66*(0.4x+2.1)-(5-2x)=1.82.4x+12.6-5+2x=1.84.4x+7.6=1.84.4x=1.8-7.64.4x=-5.8x=-5.8÷容4.4x=-22分之29即0.5分之(0.4x+2.1)-0.03分之(0.05-0.02x)=0.6的解是x=-22分之29.

解方程0.5分之0.4x-1.1+2分之x-5=0.03分之0.03+0.02x(0.4x-1.1)/0.5+(x-5)/2=(0.03+0.02x)/0.03(4x-11)/5+(x-5)/2=(3+2x)/36(4x-11)+15(x-5)=10(3+2x)24x-66+15x-75=30+20x19x=171x=9

0.5分之0.4x+0.9=0.3分之0.3+0.2x+10.4x/05 +0.9/05=03/03 +0.2x/03 +1/03(说明:0.5分之0.4x+0.9=0.4x/05 +0.9/05,0.3分之0.3+0.2x+1=03/03 +0.2x/03 +1/03)4/5x +9/5 =1+2/3x+ 10/3 两边同乘以15得12x+27=15+10x+502x=38 x=19 不懂的过程还可以追问!满意请及时采纳! O(∩_∩)O

0.4X/0.5+2.1=0.5/0.03-0.2X+0.60.8X+2.1=50/3-0.2X+0.62.4X+6.3=50-0.6X+1.82.4X+0.6X=50+1.8-6.33X=45.5X=91/6

x/0.2=3x=0.2*3x=0.6(0.4x-1)/0.5=2.5(0.4x-1)/(1/2)=2.52*(0.4x-1)=2.50.8x-2=2.50.8x=4.58x=45x=45/8x=5.625

依题,x/2-4+0.2x/0.5-0.3=0.02x/0.01化简 x/2-4+2x/5-0.3=2x移项 0.5x+0.4x-2x=4.3 -1.1x=4.3x=-43/11希望可以帮到你O(∩_∩)O

我要详细过程

1/0.1 + (0.4X-0.5)/(X-0.2) =2/1(0.4X-0.5)/(X-0.2) = 2-1/0.1(0.4X-0.5)/(X-0.2) =2 -10(0.4X-0.5)/(X-0.2)=-8(0.4X-0.5) = -8(X-0.2)0.4X-0.5 = -8X + 1.60.4X + 8X = 1.6+0.58.4X=2.1 X=1/4=0.25

(0.4x-2.1)/0.5=(0.1+0.2x)/0.03-0.6两边乘1.53(0.4x-2.1)=50(0.1+0.2x)-0.93*0.4x-3*2.1=50*0.1+50*0.2x-0.91.2x-6.3=5+x-0.91.2x-x=5-0.9+6.30.2x=10.4x=10.4÷0.2x=52

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