\(\frac{x}{142}+457=625\)
\(\frac{x}{142}=168\)
\(\Rightarrow x=168.142\)
\(\Rightarrow x=23856\)
vậy \(x=23856\)
\(x-16,7+8,6=16,9\)
\(x=16,9-8,6+16,7\)
\(x=25\)
vậy \(x=25\)
\(\left(x-1\frac{3}{4}\right)x:2\frac{1}{4}=\frac{5}{3}\)
\(\left(x-\frac{7}{4}\right)x:\frac{9}{4}=\frac{5}{3}\)
\(x^2-\frac{7}{4}x=\frac{5}{3}.\frac{9}{4}\)
\(x^2-\frac{7}{4}x=\frac{15}{4}\)
87 : x + 93 : x - 66 : x =38
65 × x + 95784 = 101569
( x : 142 ) + 457 = 625
x : \(\frac{1}{2}\)+ x : \(\frac{1}{7}\)+ x : \(\frac{1}{3}\)= 864
Tìm x
a \(\frac{3}{4}+\frac{1}{4}xX=2\)
b X - \(\frac{2}{3}x\frac{9}{4}=2,5-\frac{1}{2}\)
c \(2xX+\frac{1}{3}=\frac{4}{3}\)
d \(X:\frac{2}{3}+0,75=\frac{9}{4}+3\)
e \(\frac{6}{4}:X+\frac{1}{2}=\frac{9}{4}x\frac{2}{3}\)
f \(Xx\frac{3}{5}-\frac{2}{5}=3\frac{3}{4}-1\)
65 + x + 95784 = 101569
87 : x + 93 : x - 66 : x = 38
x : 2 + x × 4 = 7
( x : 42 ) + 457 = 625
Bài 4:
\(\frac{2}{7}\)+ \(\frac{5}{14}\)+ \(\frac{1}{7}\)+ \(\frac{3}{14}\)
\(\frac{1995×1997-1}{1996×1995+1994}\)
469 × 281 + 469 × 719
( x : 142 ) + 457 = 625
x : 1/2 + x : 1/7 + x : 1/3 = 864
Bài 2 : Tìm x , biết :
a , \(\frac{1}{2}xX-\frac{2}{3}+0,75=1,25X\frac{2}{3}\) b , 1 - \(\left(5\frac{3}{8}+x-7\frac{5}{24}\right):16\frac{2}{3}=0\) c , (X+1) + (X+2) + (X+3) + (X+4) + ..... + (X+28) = 555
d, (X+4) + (x+6) + (X+8) + ... + (X+26) = 210
Tìm \(x\):
a)\(x\) x \(3\frac{1}{3}=3\frac{1}{3}:4\frac{1}{4}\)
b)\(5\frac{2}{3}:x=3\frac{2}{3}-2\frac{1}{2}\)
c)\(\frac{x-1}{49}+\frac{x-2}{48}+\frac{x-3}{47}+\frac{x-4}{46}+\frac{x-5}{45}-5=0\)
Tính bằng cách thuật tiện nhất
\(5\frac{3}{4}:3+2\frac{1}{4}X\frac{1}{3}-\frac{3}{8}\) \(\frac{3}{5}:\frac{5}{6}:\frac{6}{7}:\frac{7}{8}+\frac{2}{5}+\frac{23}{35}\)
tính: \(\frac{7}{18}+\frac{5}{3}X1\frac{3}{9}:\frac{55}{4}\) \(\frac{72X202X28}{303X63X16}\)
tìm x: \(\frac{7}{4}-xX\frac{4}{3}=\frac{5}{19}\) \(xX\frac{1}{2}+\frac{3}{2}Xx=\frac{4}{5}\)
viết phân số thích hợp hoặc hỗn số thích hợp vào chỗ chấm;
451m....= km 75m....km 3km15m.....km 4km2m......=km 5kg5g=.....kg
mình nhờ các bạn giải giúp mình nhé mài mình cần gấp mà xX nếu X là nhân nếu x là x
Tìm x trong biểu thức sau
\(\left(3\frac{3}{4}:\frac{1}{4}-2\frac{2}{5}\cdot1\frac{1}{4}\right)-\left(3\frac{1}{2}:2,5-\frac{1}{5}\right)-\frac{1}{5}\cdot x=\frac{51}{5}\)
Bài 1 : Tìm x
a, \(\frac{1}{2}+x+1\frac{1}{2}=3\frac{3}{4}\)
b, \(\frac{5}{6}\div x-\frac{4}{9}=\frac{3}{4}\)
