數學問題~help

2006-10-21 8:00 pm

1.
Let a be the mother age
a+(a/2+2)=62

下一步？

更新1:

那我斗膽再問： a+(a-9)+a/3=64

回答 (8)

2006-10-21 8:06 pm

✔ 最佳答案

a + a/2 +2 = 62
將條公式每邊*2:

2a+ a + 4 = 62*2
3a = 124-4 = 120
a= 40

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2006-10-21 8:22 pm

a+a/2+2=62
a+a/2=60
2a/2+a/2=60
3a/2=60
3a=120
a=40

40+(40/2+2)=62
60+22=62
correct

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2006-10-21 8:11 pm

a+(a/2+2)=62
a+a/2+2=62
1.5a+2=62
1.5a=60
a=40

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2006-10-21 8:10 pm

a+a/2+2=62
2a+a+4=124
3a=120
a=40

mother's age is 40

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2006-10-21 8:10 pm

?????._. =40

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2006-10-21 8:09 pm

a+a/2+2=62
a+a/2=60
3a/2=60
a = 40

???????????????
唔係真係咁 ar... 考試你死梗喎~~~

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2006-10-21 8:07 pm

2a/2 + (a/2+4/2) = 124/2 (通分母)
2a+a+4 =124
3a+4=124
3a=120
a=40

參考: 我

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2006-10-21 8:06 pm

i don't know
=129

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