數學唔色做教教我

120x+200(5500-x)=916000
120x+1100000-200x=916000
-80x=916000-1100000
-80x= -184000
x=2300

30(3/8x)-20(x-3/8x-80)=130
11.25x-20x-7.5x+1600=130
-16.25x=1470
x=90.46

66-x=2(10.5+x)
66-x=21+2x
66-21=2x+x
45=3x
15=x

x+8/28-5-26/28=1
x-22/14-5=1
x-11/7-5=1
x=6+11/7

1500x+800(15x+650)=794500
1500x+12000+520000=794500
1500x=262500
x=175

15*550+650=8900←哩題唔清楚你講咩囉

1500x+800(1200)=1140000
1500x+960000=1140000
1500x=180000
x=120
希望幫到你啦,記得投我,plx
我中一咋,唔知你mind唔mind

你都係打好d字啦，我係f.1仔呀(不過maths係全班第一)

120x+200(5500-x)=916000
120x+1100000-200x=916000
-80x=916000-1100000
-80x= -184000
x=2300

30(3/8x)-20(x-3/8x-80)=130
11.25x-20x-7.5x+1600=130
-16.25x=1470
x=90.46

66-x=2(10.5+x)
66-x=21+2x
66-21=2x+x
45=3x
15=x

x+8/28-5-26/28=1
x-22/14-5=1
x-11/7-5=1
x=6+11/7

1500x+800(15x+650)=794500
1500x+12000+520000=794500
1500x=262500
x=175

15*550+650=8900←Ｅ題做唔到


1500x+800(1200)=1140000
1500x+960000=1140000
1500x=180000
x=120

希望幫到你！！

2008-11-11 20:58:02 補充：
如果你睇到嫁話，
你寫清楚一ｄ第６題
咁我就可以幫到你啦！

120 x + 1,100,000-200X = 916000
80x =184000
x=2300

我唔識- -
我得小6= =
SoRrY~

未學喎~!
我五年級-,-
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