Giải hộ nha
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\(a.x+\dfrac{3}{7}=\dfrac{2}{5}+\dfrac{3}{10}\)
\(x+\dfrac{3}{7}=\dfrac{7}{10}\)
\(x=\dfrac{7}{10}-\dfrac{3}{7}\)
\(x=\dfrac{19}{70}\)
\(b.\dfrac{19}{20}-x=\dfrac{8}{5}-\dfrac{3}{4}\)
\(\dfrac{19}{20}-x=\dfrac{17}{20}\)
\(x=\dfrac{19}{20}-\dfrac{17}{20}\)
\(x=\dfrac{2}{20}=\dfrac{1}{10}\)
\(A,\dfrac{9}{7}-\dfrac{6}{8}=\dfrac{72}{56}-\dfrac{42}{56}=\dfrac{30}{56}=\dfrac{15}{28}\)
\(b,\dfrac{91}{42}-\dfrac{54}{42}=\dfrac{27}{42}\)
c và d làm tương tự nhé ( mà sao dấu trừ dấu cộng bay xuống mẫu số vậy =)
Gọi số hoa của Hằng và Nga lần lượt là a,b
Theo đề, ta có: a-b=18 và a+6=5/3b
=>a-b=18 và a-5/3b=-6
=>a=54 và b=36
25/9-2=25/9-18/9=7/9
4-5/7=28/7-2/7=26/7
189/45-2=189/45-90/45=99/45
6-1515/1818=6-15/18=6-5/6=36/6-5/6=31/6
What does the mother look like?
What does the mother do?
Who is taller, the son or the daughter?
How old is the daughter?
What class is the son in?
a: OA<OB
=>A nằm giữa O và B
=>OA+AB=OB
=>AB=2cm
b: Vì OA<OC
nên A nằm giữa O và C
mà OA=1/2OC
nên A là trung điểm của OC
ai giải hộ mik điiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii mà
Bài 1:
a: =2/3+7/5=10/15+21/15=31/15
b: =3/4+1/8=6/8+1/8=7/8
c: =225/25+7/25=232/25
d: =5/8+8=64/8+5/8=69/8
Nam is a student, he's 16 years old. He goes to school from Monday to Friday. The classes start at 7 o'clock and finish at 11.30 every day. He likes English very much. He has it on Monday, Wednesday and Thursday. He doesn't have any classes on Saturday and Sunday. He stays at home and does housework, watches TV and listens to music these days