\(\Rightarrow\)X*(3/5+2/7)=31/70
\(\Rightarrow\)X*31/35=31/70
\(\Rightarrow\)X=31/70:31/35
\(\Rightarrow\)X=1/2
\(x.\frac{3}{5}+x.\frac{2}{7}=\frac{31}{70}\)
\(x.\frac{31}{35}=\frac{31}{70}\)
\(x=\frac{1}{2}\)
Các câu hỏi tương tự
x*3/5+x*2/7=31/70
x*x-1/6=5/18
tim x
tim x: X x 3/5 + X x 3/7 = 31/70
a ( X + 7 ) x 8 -14 = 66
b 1+2+3+...+X = 1711
c X + 3/5 + X x 2/7 = 31/70
d 1/7 + 6/7 x X = 1/7
a) x*4+2,7=22,7 b)49.8-x:2,4=29,8 c)1/7+2/5*x=3/7 d)x*4+x*15=1919 e)x*0,7-x*0,2=28 f)x*3/5+x*2/7=31/70
\(X\times\frac{3}{5}+X\times\frac{2}{7}=\frac{31}{70}\)
X = .........(NHẬP KẾT QUẢ DƯỚI DẠNG SỐ THẬP PHÂN GỌN NHẤT)
tim y biet:y x 3/5 + y x 2/7=31/70
;;
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B , ( 2/15 + 3/40 + 4/96 + 5/204 + 6/391 ) *x ( x-1) =20/69
A , ( 1/4 + 1/28 + 1/70 + ...... + 1/8554 ) *x = 31/94
Xx 3/5+Xx2/7=31/70
x : 1/2 + x :1/3 + x = 42 ; x x 4/7 + x x 2/3 + x x 3/7 = 11/5 ; ( 31/5 - x ) : 2/3 = 7/6 ; 4/3 + ( x - 3/5 ) = 21/2