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解方程.1.6×(5%X

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5%x (300-x)×4=13 0.2(300-x)=13 300-x=65 x=300-65 x=235

(1)12.5-5%x=7.5, 12.5-5%x+5%x=7.5+5%x, 12.5=7.5+5%x, 12.5-7.5=7.5+5%x-7.5, 5%x=5, 5%x÷5%=5÷5%, x=100;(2)x-23%x=15.4 77%x=15.4, 77%x÷77%=15.4÷77%, x=20;(3)x4+12.5%x=150, 0.375x=150, 0.375x÷0.375=150÷0.375, x=4...

1.125x=18 x=18÷1.125=16

(1)60%X+25=40, 60%X+25-25=40-25, 60%x=15, 60%x÷60%=15÷60%, x=25;(2)X+12.5%X=72, 1.125x=72,1.125x÷1.125=72÷1.125, x=64;(3)75%X- 1 16 =0.5X,75%X- 1 16 + 1 16 =0.5X + 1 16 ,75%x-0.5x=0.5x + 1 16 -0.5x,0.25x= 1 1...

解方程(要过程): 4分之3x + 5%x = 17.6 0.8x=17.6 x=22 3分之4÷ x =6分之5 x=4/3÷5/6 x=8/5 x=1.6 (6分之5+8分之5)× x=20分之7 35/24x=7/20 x=7/20÷35/24 x=6/25 能简算的要简算: 24 × 36分之5 -8分之3 =10/3-3/8 =71/24 =2又23/24 10分...

(1)34x-5%x=17.5, 0.7x=17.5, 0.7x÷0.7=17.5÷0.7, x=25;(2)35-15%x=20,35-15%x+15%x=20+15%x, 35-20=20+15%x-20, 15=15%x, 15÷15%=15%x÷15%, x=100;(3)x+x3=8, 43x=8, 43x÷43=8÷43, x=6.

(4分之1-12.5%)x=10 即 (1/4-1/8)x=10 得 x=80 5分之4x-8分之3=8分之5 即 4/5x-3/8=5/8 得 x=5/4 5分之3:x=3分之1:2 即 3/5×2=1/3x 得 x=18/5 0.4:3.5=1.6:x 即 0.4x=3.5×1.6 得 x=14 3+0.8x=45 x=105/2

(1)X- 2 5 X=18, 3 5 X=18, 3 5 X ÷ 3 5 =18 ÷ 3 5 ,X=30; (2)X-10%X=27, 90%X=27, 0.9X=27, 0.9X÷0.9=27÷0.9, X=30;(3)62.5%X+ 1 8 = 3 4 , 62.5%X+ 1 8 - 1 8 = 3 4 - 1 8 , 62.5%X= 5 8 , 0.625X= 5 8 ,0.625X÷0.625= 5 ...

x=32/5

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