\(x+x\div5\times\frac{15}{2}+x\div2\times9\)
\(x+\frac{x}{5}\times\frac{15}{2}+\frac{x}{2}\times9=315\)
\(\Leftrightarrow x+\frac{3x}{2}+\frac{9x}{2}=315\)
\(\Leftrightarrow7x=315\Rightarrow x=45\)
X+X:5x15/2+X:2x9 = 315
Tìm x : X + x : 5 x 7.5 + x : 2 x 9 = 315
x+x/5*7.5+x*9=315
Tìm x
3/4:6/x:8/7=3/8:4/5:6/7
2/5:x/3:7/4=24/315
k) 4 x 113 x 25 - 5 x 112 x 20
p) 1235 x 6789 x ( 630 - 315 x 2 ) :1996
l) 54 x 113 + 45 x 113 + 113
u) ( 500 x 9 - 250 x 18 ) x ( 1 +2 +3 +.......+ 9 )
tìm x\(\frac{15}{17}x\frac{51}{5}< X< \frac{67}{9}+\frac{35}{9}\)
23 x 315 + 11 x 315 + 33 x 630 tish thuận tiện đấy nhé
tính bằng hai cách
a) \(\left(\frac{6}{11}+\frac{5}{11}\right)x\frac{3}{7}\) b) \(\frac{3}{5}x\frac{7}{9}+\frac{3}{5}x\frac{2}{9}\)
c) \(\left(\frac{6}{7}-\frac{4}{7}\right):\frac{2}{5}\) d) \(\frac{8}{15}:\frac{2}{11}+\frac{7}{15}:\frac{2}{11}\)
giúp mik nha
Tính nhanh
\(\frac{3}{2}\)x\(\frac{4}{5}\)x\(\frac{2}{6}\)x\(\frac{15}{4}\)
giúp mình vs với !! Mình tick cho
