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a, 75 x x = 1800 x = 1800 : 75 x = 24 c, x x 405 = 86265 x = 86265 : 405 x = 213 Đây nha em.
a, 75 x X = 1800
x= 1800:75
x= 24
b, 1855:X = 35
x=1855:35
x =53
\(\frac{1}{2}\) x 24 + \(\frac{1}{2}\)x 75 + \(\frac{1}{2}\)
= \(\frac{1}{2}\) x 24 + \(\frac{1}{2}\)x 75 + \(\frac{1}{2}\) x 1
= \(\frac{1}{2}\)x ( 24 + 75 + 1 )
= \(\frac{1}{2}\) x 100
= 50
\(\frac{1}{2}\times24+\frac{1}{2}\times75+\frac{1}{2}\)
\(=\frac{1}{2}\times\left(24+75+1\right)\)
\(=\frac{1}{2}\times100\)
\(=50\)
kick mk đi mk kick lại
(83/10+y) x 3/2 =75/4
83/10+y =75/4 : 3/2
83/10+y =25/2
y =25/2-83/10
=> y =21/5
x/2 + 2/3 nhân x + 3/4 nhân x = 23/12
x nhân (1/2+2/3+3/4) = 23/12
x nhân 23/12 = 23/12
x = 23/12 : 23/12
x = 1
Vậy x = 1
Tk mk nha
\(\frac{3}{8}.x=4\)
\(\Rightarrow x=4:\frac{3}{8}\)
\(\Rightarrow4.\frac{8}{3}\)
\(\Rightarrow\frac{32}{3}\)
Chúc bạn học giỏi nha!!!
K mik mik k lại
\(\frac{3}{2}x+\frac{1}{5}x=\frac{5}{8}\)
\(Xx\left(\frac{3}{2}+\frac{1}{5}\right)=\frac{5}{8}\)
\(x=\frac{5}{8}:\left(\frac{3}{2}+\frac{1}{5}\right)\)
\(x=\frac{25}{68}\)
X + 3/8=4/3
x =4/3-3/8
x =23/24
X x 1/9=21/8
X =21/8:1/9
X =7/24
X-5/4=7/6
X =7/6+5/4
X =21/8
X:8/3=5
X =5x8/3
X =40/3
Duyệt nha!
\(a,\frac{10}{21}×\frac{14}{25}=\frac{4}{15}\)
\(b,3\frac{1}{3}×\frac{12}{35}=\frac{10}{3}×\frac{12}{35}=\frac{8}{7}\)
\(c,\frac{7}{15}×\frac{11}{13}+\frac{7}{15}×\frac{2}{13}+\frac{8}{15}=\frac{7}{15}+\frac{8}{15}=1\)
\(d,\left(\frac{41}{75}+\frac{17}{10}\right)×\frac{80}{129}=\frac{4}{9}\)
\(\frac{x}{7}x\frac{4}{9}x5=\frac{3x4x5}{7x9}\)
\(\frac{x}{7}x\frac{4}{9}x5=\frac{20}{21}\)
\(\frac{x}{7}x\frac{4}{9}=\frac{20}{21}:5\)
\(\frac{x}{7}x\frac{4}{9}=\frac{4}{21}\)
\(\frac{x}{7}\) \(=\frac{4}{21}:\frac{4}{9}\)
\(\frac{x}{7}\) \(=\frac{9}{21}\) \(=\frac{3}{7}\)
Vay x la 3
75 × x = 1800
x = 1800 : 75
x = 24