Xx2+2.5x=200

Xx2+2.5x=200
x=40

如果係2X+2.5X=200既話
即係2乘X加2.5乘X=200
咁
2X+2.5X=200
4.5X=200
X= 200/4.5
X=400/9=44.444...

2X+2.5X=200
4.5X=200
X=200/4.5(除以4.5)
所以X=44又4/9

2x+2.5x=200

4.5x=200

x=44 4/9

咁x=yyyyy

2x+2.5x=200
4.5x=200
x=200÷4.5
x=44 2／5

2006-12-11 20:57:57 補充：
x約＝44 2/5

2006-12-11 20:58:30 補充：
x=44.444... x=44.444... x=44.444... x=44.444... x=44.444... x=44.444...

2006-12-11 21:00:39 補充：
這些練習下就會越做越好越做越好越做越好越做越好越做越好越做越好越做越好越做越好越做越好越做越好越做越好

x(2+2.5)=右200
x=400/9