Question

求一道解方程题，我解了好久解出6个答案，都不一样，一一验算，全错！希望好心人能帮帮我，关联考试，谢谢

(0.4x+0.9)/0.5-(0.1x-0.5)/0.2=(0.03+0.02x)/0.03
写出详细过程……快啊我会追加悬赏分的
到底哪个是准确的啊？请同志们准确点啊

Answer 1

(0.4x+0.9)/0.5-(0.1x-0.5)/0.2=(0.03+0.02x)/0.03
10x(0.4x+0.9)/5-10x(0.1x-0.5)/2=100x(0.03+0.02x)/3
10x6x(0.4x+0.9)-10x15x（0.1x-0.5)=100x10x(0.03+0.02x)
60x(0.4x+0.9)-150x(0.1x-0.5)=1000x(0.03+0.02x)
24x+54-15x+75=30+20x
11x=99
x=9

Answer 2

(0.4x+0.9)/0.5-(0.1x-0.5)/0.2=(0.03+0.02x)/0.03
2（0.4x+0.9)-5(0.1x-0.5)=100/3(0.03+0.02x)
0.8x+1.8-0.5x+2.5=1+2x/3
0.3x-2x/3=1-2.5-1.8
-11x/20=-3.3
x=-3.3*(-20/11)
x=6

Answer 3

（0.8x+1.8）-（0.5x-2.5）=1+2/3x
0.3x+4.3=1+2/3x
x=9

Answer 4

2(0.4X+0.9)-5(0.1X-0.5)=(0.03+0.02X)乘100/3 0.8X+1.8-0.5X+2.5=0.03乘100/3+0.02X乘100/3 0.3X+4.3=1+2/3X X=9 因为除以一个数等于乘以这个数的倒数

Answer 5

等式两边先乘3得
6(0.4x+0.9)-15(0.1x-0.5)=100(0.03+0.02x)
等式两边先乘10得
24x+54-15x+75=30+20x
11x=99
x=9

Answer 6

(0.4x+0.9)/0.5-(0.1x-0.5)/0.2=(0.03+0.02x)/0.03
10x(0.4x+0.9)/5-10x(0.1x-0.5)/2=100x(0.03+0.02x)/3
10x6x(0.4x+0.9)-10x15x（0.1x-0.5)=100x10x(0.03+0.02x)
60x(0.4x+0.9)-150x(0.1x-0.5)=1000x(0.03+0.02x)
24x+54-15x+75=30+20x
11x=99
x=9