cho x+y=18 và 3x+2y=43
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DN
0
TP
5
27 tháng 9 2018
2.3.4.5.6....2011 chia hết cho 6 vì có một thừa số trong tích đó là 6.
27 tháng 9 2018
Today is the day we graduated, goodbye secondary school dear. Everyone hugged each other and cried.
Class leader:
- Dear teacher and students, 4 years experience together with the beautiful memories please keep in mind do not cry to celebrate the tears in tears.
Headteacher:
- That's right! Please smile, because we are far apart can not possibly not meet each other right ...
Class:
- We apologize to you for the time we've had a hard time making us upset about us. We promise after graduation will try to succeed in the career and not let her down ...
Headteacher:
- You really have to try harder to reach your dream. I hope you will succeed ....
Vice monitor:
- Our class - the class of success will overcome all the challenges on the path to the future. Yes the whole class
My class rushed to hug her:
- Miss! We thank you for teaching us things we never knew. We love you ....
27 tháng 9 2018
A:Who's your new friend ?
B: Oanh.She is friendly.
A:oh! What is her hobby ?
B: She s to read books and write stories.
B:She is my classmate.
A:What is her favourite subject ?
B: Her favourite subject is English, music and biology.
vậy thui nha, mình cũng ko biết nhìu lắm vì bài này mình chưa học.
RG
0
DN
2
PD
27 tháng 9 2018
tử số :326.225.11
mẫu ;213.313.3.22.11=215.314.11
=>210.312=(25.36)2=(32.729)2=233282
27 tháng 9 2018
1, Asia: Châu Á
2, Africa: Châu Phi
3, Europe: Châu Âu
4, Holland: Hà Lan
5, lovely: đáng yêu
6,ice-skating: trượt băng
Ta có :
\(x+y=18\) \(\Rightarrow x=18-y\)
\(3x+2y=43\)
\(\Rightarrow3\left(18-y\right)+2y=43\)
\(54-3y+2y=43\)
\(-3y+2y=43-54\)
\(-y=-11\)
\(y=11\)
\(\Rightarrow x=7\)
\(x+y=18\)
\(\Rightarrow2x+2y=36\)
\(\Rightarrow3x+2y-\left(2x+2y\right)=43-36\)
\(\Rightarrow3x+2y-2x-2y=7\)
\(\Rightarrow x=7\)
\(\Rightarrow y=18-x=18-7=11\)