Tim x :2/5+3/5×(3x-3,7)=-53/10
x : 2/5 + 3/5 . (3x - 3,7) = -53/10
x. 2/5 + 3/5. 3x - 3/5. 37/10 = -53/10
x . 5/2 + 9/5.x - 111/50 = -53/10
x. ( 5/2 + 9/5) = -53/10 + 111/50
x . 43/10 = -73/25
x = -73/25 : 43/10
x = -146/215
Tim x : 2/5+3/5×(3x-3,7)=-53/10
\(\frac{2}{5}+\frac{3}{5}\times\left(3x-3,7\right)=-\frac{53}{10}\)
\(\frac{3}{5}\times\left(3x-3,7\right)=-\frac{53}{10}-\frac{2}{5}\)
\(\frac{3}{5}\times\left(3x-3,7\right)=\frac{-53-4}{10}\)
\(\frac{3}{5}\times\left(3x-3,7\right)=-\frac{57}{10}\)
\(3x-3,7=-\frac{57}{10}\div\frac{3}{5}\)
\(3x-3,7=-\frac{57}{10}\times\frac{5}{3}\)
\(3x-3,7=-\frac{19}{2}\)
\(3x=-\frac{19}{2}+\frac{37}{10}\)
\(3x=\frac{-95+37}{10}\)
\(3x=-\frac{58}{10}\)
\(x=-\frac{29}{5}\div3\)
\(x=-\frac{29}{5}\times\frac{1}{3}\)
\(x=-\frac{29}{15}\)
Chúc bạn học tốt
Mà ban nè -29/5 ở mo ra rứa bạn
\(-\frac{29}{5}\) là rút gọn của \(-\frac{58}{10}\) đó bn
tìm x
2/5 + 3/5 . (3x - 3,7) = -53/10
\(\frac{2}{5}+\frac{3}{5}.\left(3x-3,7\right)=\frac{-53}{10}\)
\(\frac{3}{5}.\left(3x-3,7\right)=\frac{-57}{10}\)
\(\left(3x-3,7\right)=\frac{-19}{2}\)
\(3x=-5,8\)
\(x=\frac{-29}{15}\)
Vậy \(x=\frac{-29}{15}\)
Dễ quá mà bn ko biết làm à
2/3x -3/2x=5/12
x(2/3-3/2)=5/12
x=5/12. (-5/6)
x=-25/72
B, 2/5 + 3/5 . ( 3 x - 3,7 ) = - 53/10
c, / x / - 3 /4 = 5 /3
d, / 2 x - 1/3 / + 5/6 = 1
A)2/5+3/5.(3.x-3,7)=-53/10
b)7/9:(2+3/4.x)+5/9=23/27
c)|2.x-1/3|+5/6=1
a)<=>10+15(3x-3,7)=-5,3
<=>10+45x-55,5=-5,3
<=>45x-45,5=-5,3
<=>45x=40,2
<=>x=\(\frac{40,2}{45}\)
b)
tim x
2/5+2/5.(3.x-3,7)=-53/10
7/9 / (2+3/4.x)+5/9=23/27
Mấy bài này bình thường mà bạn ! Bạn áp dụng tính chất phân phối
2/5+3/5 . (3x - 3,7) =-53/10
\(\frac{2}{5}+\frac{3}{5}\times\left(3x-3,7\right)=-\frac{53}{10}\)
\(\frac{3}{5}\times\left(3x-3,7\right)=-\frac{53}{10}-\frac{2}{5}\)
\(\frac{3}{5}\times\left(3x-3,7\right)=-\frac{57}{10}\)
\(\left(3x-3,7\right)=-\frac{57}{10}\div\frac{3}{5}\)
\(3x-3,7=-\frac{19}{2}\)
\(3x=-\frac{19}{2}+3,7\)
\(3x=-\frac{29}{5}\)
\(x=-\frac{29}{5}\div3\)
\(x=-\frac{29}{15}\)
Chúc bạn học tốt ^^
2/5+3/5.(3x-3,7)=-53/10
3/5.(3x-37/10)= -53/10-2/5
3/5.(3x-37/10)=-57/10
3x-37/10 =-57/10 : 3/5
3x-37/10=-19/2
3x =-19/2+37/10
3x =-29/15
x=-29/15 : 3
x=-29/15
Tìm x biết:
2/5 + 3/5.(3x - 3,7) = -53/10
7/9 : (2+3/4x)+ 5/9 = 23/27
-2/3 . x + 1/5 = 3/10
|x| - 3/4 = 5/3
|2x- 1/3| + 5/6 = 1
4.x=29/12;-29/12
Câu cuối ban viết rõ lên nhé