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a) \(210:x=2,1:0,25=8,4\)
\(x=210:8,4=25\)
b) \(x.2+x.0,5=6,25\)
\(2,5x=6,25\)
\(x=6,25:2,5=2,5\)
c) \(x:0,25-x=15,6\)
\(3x=15,6\)
\(x=5,2\)
d) \(x:12,5=3,75.4=15\)
\(x=15.12,5=187,5\)
e) \(x.12,6-x.5,6=42\)
\(7x=42\)
\(x=6\)
g) \(x:0,1-x:4-x.0,75=2,25\)
\(10x-\dfrac{x}{4}-\dfrac{3x}{4}=2,25\)
\(9x=2,25\)
\(x=0,25\)
3.75 : \(\dfrac{1}{4}\) + 3.75 : 0.5 + 3,75 + \(\dfrac{1}{8}\) + 3,75 x 86
= 3,75 : \(\left(\dfrac{1}{4}+0.5+\dfrac{1}{8}\right)\) + 3,75 x 86
= 3,75 : \(\dfrac{7}{8}\) + 322.5
= 4,3 + 322.5 = 326,8
tích hộ chị nha
\(x\div0,5+x\div0,25+x\div0,125=3,75\)
\(\Leftrightarrow2x+4x+8x=3,75\)
\(\Leftrightarrow x\left(2+4+8\right)=3,75\)
\(\Leftrightarrow14x=3,75\)
\(\Leftrightarrow x=\frac{3,75}{14}\)
\(\Leftrightarrow x=0,2678571\)
\(\text{Vậy }x=0,2678571\)
3,75:0,5+3,75.7-3,75
=3,75x2+3,75x7-3,75x1
=3,75x(2+7-1)
=3,75x8
=30
3,75:0,5+3,75*7-3,75
=3,75*2+3,75*7-3,75*1
=3,75*(2+7-1)
=3,75*8
=30
tick nha
a: =472x2+472x5+472x2
=472x9=4248
b: =3,6x8+7,2x4+7,2x2
=7,2(4+4+2)
=72
d: =2,4(6,2+1,9x2)=24
a: =472x2+472x5+472x2
=472x9=4248
b: =3,6x8+7,2x4+7,2x2
=7,2(4+4+2)
=72
d: =2,4(6,2+1,9x2)=24
Ta có : \(\frac{\left(11,2-10-1,2\right)x\left(3,75-0,75\right)}{2011+3014}=\frac{0x3}{2011+3014}=\frac{0}{2011+3014}=0\)
\(\Rightarrow\left(2000\times7,5+2012:3\right)\times\left(21-3,5\times0,25\right)\times\frac{\left(11,2-10-1,2\right)\times\left(3,75-0,75\right)}{2011+3014}\)
\(=\left(2000\times7,5+2012:3\right)\times\left(21-3,5\times0,25\right)\times0\)
\(=0\)
1,2 x ( 2,5:P)=3,6
2,5:P = 3,6:1,2
2,5:P = 3
P = 2,5:3
P = \(\dfrac{5}{6}\)
=3,75(0,25+0,5+0,25)
=3,75x1
=3,75
3,75 x 0,25 + 3,75 x 0,5 + 3,75 x 0,25
= 3,75 x (0,25 + 0,5 + 0,25)
= 3,75 x 1
= 3,75