如果一條數裡面有兩,三個既方程,應該點計?
1. 2-3(m-1)=-10
2. 5-(6a+1)=3-(a-1)
3. 2(z+5)-3(z-3)=4z
4. 5(2a-5)+4(1-a)=3
我唔要答案同式! 我想要既係.每一步應該點做,
係咪每次遇到呢d數.都係咁計?
另外,
我仲想問
Write down a pair of like terms in each of the following algebraic expressions.
以上呢句點解?
唔一定識晒就答架....唔該晒!
兩,三個代數符號的方程
2008-09-28 10:30 pm
回答 (1)
2008-10-05 7:07 pm
✔ 最佳答案
1. 2-3(m-1)=-10(-1)(m-1)=-10
m-1=+10
m=11
2. 5-(6a+1)=3-(a-1)
5-3=(a+1)+(6a+1)
5-3=7a
2=7a
2/7=a
a=2/7
3. 2(z+5)-3(z-3)=4z
2z+10-3z-3=4z
2z-3z+10-3=4z
-1z+7=4z
(-1z)-(-4z)=-7
3z=7
z=2 1
3
Sorry 其餘的不懂得
收錄日期: 2021-04-13 16:06:47
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080928000051KK01236