2. 4/3 -- 12/5-3q = 3/2
3. --2 [3(2a--1)--5]+7=71
4. 5--(8/7n+3)+(4/2n+2)= (3/6-3n)
唔該你地呀><我真係好急需,
更新1:
我睇错野~_~.....唔洗括号, 5-- 8/7n+3 + 4/2n+2= 3/6-3n -- 系减号,因为太細驚有d人睇唔到,所以特登拉長 唔好意思呀
更新2:
幫我解答左既人,好多謝你地也>_
20點)中1方程,有步驟,今日內要完成><.......4題
2011-10-27 5:14 am
1. 11=2/5x + 2
2. 4/3 -- 12/5-3q = 3/2
3. --2 [3(2a--1)--5]+7=71
4. 5--(8/7n+3)+(4/2n+2)= (3/6-3n)
唔該你地呀><我真係好急需,
2. 4/3 -- 12/5-3q = 3/2
3. --2 [3(2a--1)--5]+7=71
4. 5--(8/7n+3)+(4/2n+2)= (3/6-3n)
唔該你地呀><我真係好急需,
回答 (4)
2011-10-27 6:19 am
✔ 最佳答案
1.) 11=2/5x + 29=2/5x +2
45=2x
2x=45
x=22.5
2.)4/3 -- 12/5-3q = 3/2
20/15 --36/15 --3q=3/2
-16/15--3q=3/2
-3q=3/2 + 16/15
-3q=45/30 + 32/30
-3q=77/30
q=-77/90
3.)--2 [3(2a--1)--5]+7=71
--2(6a-3-5)+7=71
--2(6a-8)+7=71
--12a+16+7=71
--12a+23=71
--12a=48
a=-4
4.)5--(8/7n+3)+(4/2n+2)= (3/6-3n)
5--8/7n+ 3 +4/2n+2= 3/6-3n
n=57/6 X 8/33
n=76/33
2011-10-26 22:33:12 補充：
my ans is good?
2011-10-28 1:31 am
1.
11=2/5x + 2
9=2x/5
45=2x
x=22.5
2.
4/3-12/5-3q=3/2
-16/15-3q=3/2
-3q=77/30
q=-77/90
3.
-2 [3(2a-1)-5]+7=71
-2[3(2a-1)-5]=64
3(2a-1)-5=-32
3(2a-1)=-27
2a-1=-9
2a=-8
a=-4
4.
5- 8/7n+3 + 4/2n+2= 3/6-3n
10+6/7n=1/2-3n
19/2=-27/7n
133/2=-27n
n=-133/54
11=2/5x + 2
9=2x/5
45=2x
x=22.5
2.
4/3-12/5-3q=3/2
-16/15-3q=3/2
-3q=77/30
q=-77/90
3.
-2 [3(2a-1)-5]+7=71
-2[3(2a-1)-5]=64
3(2a-1)-5=-32
3(2a-1)=-27
2a-1=-9
2a=-8
a=-4
4.
5- 8/7n+3 + 4/2n+2= 3/6-3n
10+6/7n=1/2-3n
19/2=-27/7n
133/2=-27n
n=-133/54
2011-10-27 6:03 am
1. 11 = 2/5x + 2
55 = 2x + 10
2x = 45
x = 22.5
2. 4/3 - 12/5 - 3q = 3/2
3q = -87/30
q = -29/30
3. -2[3(2a-1)-5]+7=71
-6(2a-1) + 17 = 71
-6(2a-1) = 54
2a-1 = -9
2a = -8
a = -4
第4題我5明你的意思...先括好所有括號先計到...
55 = 2x + 10
2x = 45
x = 22.5
2. 4/3 - 12/5 - 3q = 3/2
3q = -87/30
q = -29/30
3. -2[3(2a-1)-5]+7=71
-6(2a-1) + 17 = 71
-6(2a-1) = 54
2a-1 = -9
2a = -8
a = -4
第4題我5明你的意思...先括好所有括號先計到...
參考: own knowledge
2011-10-27 5:31 am
1. 11ｘ5=(2/5)ｘ5+2ｘ５
55=2x+10
45=2x
x=22.5
第一題計左 但唔知咩係--
55=2x+10
45=2x
x=22.5
第一題計左 但唔知咩係--
收錄日期: 2021-04-20 11:44:24
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