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| | x + 5 | - 4 | = 3
<=> x + 5 = 3 + 4
<=> x + 5 = 7
<=> x = 7 - 5
<=> x = 2
Chúc bạn học tốt!!!
a) 7/2.x - (7.(18+45+47))=3
7/2.x - 7.110 = 3
7/2.x - 770 =3 => 7/2.x = 3+770=773
=> x = 773 : 7/2 = 1546/7
b) 19/3 - ( 4x+6x+x)= 4/7 : 2/5
19/3 - 11x = 10/7
11x = 19/3 - 10/7 = 103/21
x = 103/21 : 11 = 103/231
a
\(5\frac{4}{7}:x+=13\)
\(\frac{39}{7}:x=13\)
\(x=\frac{39}{7}:13\)
\(x=\frac{3}{7}\)
\(\frac{4}{7}x=\frac{9}{8}-0,125\)
\(\frac{4}{7}x=1\)
\(x=1:\frac{4}{7}\)
\(x=\frac{7}{4}=1\frac{3}{4}\)
\(a)\frac{2}{3}x-\frac{1}{2}=\frac{5}{12}\)
\(\Rightarrow\frac{2}{3}x=\frac{5}{12}+\frac{1}{2}=\frac{11}{12}\)
\(\Rightarrow x=\frac{11}{12}:\frac{2}{3}=\frac{11}{8}\)
\(b)\left(2\frac{4}{5}x-50\right):\frac{2}{3}=51\)
\(\Rightarrow\frac{14}{5}x-50=51.\frac{2}{3}=34\)
\(\Rightarrow\frac{14}{5}x=34+50=84\)
\(\Rightarrow x=84:\frac{14}{5}=30\)
a) 2/3.x - 1/2 = 5/12
2/3.x = 5/12 + 1/2
2/3.x = 11/12
x = 11/12 : 2/3
x = 11/8
b) \(\left(2\frac{4}{5}.x-50\right):\frac{2}{3}=51\)
\(\frac{14}{5}.x-50=51.\frac{2}{3}\)
\(\frac{14}{5}.x-50=34\)
\(\frac{14}{5}.x=34+50\)
\(\frac{14}{5}.x=84\)
\(x=84:\frac{14}{5}\)
\(x=30\)
( X - 1/2 ) . 5/2 + 1/2 = 7/4
( X - 1/2 ) . 5/2 = 7/4 - 1/2
( X - 1/2 ) . 5/2 = 5/4
X - 1/2 = 5/4 : 5/2
X - 1/2 = 1/2
X = 1/2 + 1/2
X = 1/4
\(\left(x-\frac{1}{2}\right).\frac{5}{2}+\frac{1}{2}=\frac{7}{4}\)
<=>\(\left(x-\frac{1}{2}\right).\frac{5}{2}=\frac{5}{4}\)
<=>\(x-\frac{1}{2}=\frac{5}{4}:\frac{5}{2}\)
<=>\(x-\frac{1}{2}=\frac{1}{2}\)
<=>x=1
\(x=\frac{-6}{15}+\frac{-3}{10}\)
\(x=\frac{-7}{10}\)
Vậy.................
\(\frac{x}{2}=\frac{1}{4}+\left|\frac{-7}{8}\right|\)
\(\frac{x}{2}=\frac{9}{8}\)
\(\Rightarrow8x=18\)
\(x=18:8\)
\(x=2,25\)
Vậy........................
a, x=-5/33
b, x=-30
c, (Nếu dấu của bạn là giá trị tuyệt đối) x=1/3 hoặc x=-1/3
Nếu cần mik giải rõ ràng cho