X : 0,25 + 6 x X = 12,81 + 7,19
help me!!!!
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X : 0.25 + X × 11 = 24
X × 4 + X ×11 = 24
X × ( 4+11)= 24
X ×15 = 24
X = 8/5
x . 4 . 0,25 = 3,2
x .4 = 3,2 : 0,25
x . 4 = 12,8
x = 12,8 : 4
x = 3,2
. là nhân
X × 4 × 0,25 = 3,2
X × 4 = 3,2 ÷0,25
X × 4 = 12,8
X = 12,8 ÷ 4
X = 3,2
a: \(=27\left(77+15\right)+27\cdot8\)
\(=27\cdot92+27\cdot8=27\cdot100=2700\)
b: \(=75\cdot89+75\cdot9+2\cdot75=75\left(89+9+2\right)=75\cdot100=7500\)
c: \(=0.25\left(42.9-11.7+0.8\right)=0.25\cdot32=8\)
d: 738 phút=12,3 giờ
1. \(x-8+32=68\)
\(x-8=68-32\)
\(x-8=36\)
\(x=36+8\)
\(x=44\)
_____
2. \(x+8+32=68\)
\(x+8=68-32\)
\(x+8=36\)
\(x=36-8\)
\(x=28\)
_____
3. \(98-x+34=43\)
\(98-x=43-34\)
\(98-x=9\)
\(x=98-9\)
\(x=89\)
_____
4. \(98+x-34=43\)
\(98+x=43+34\)
\(98+x=77\)
\(x=77-98\)
\(x=-21\)
_____
5. \(x:5:4=800\)
\(x:5=800.4\)
\(x:5=3200\)
\(x=3200.5\)
\(x=16000\)
_____
6. \(18+x=384:8\)
\(18+x=48\)
\(x=48-18\)
\(x=30\)
_____
7. \(\left(84,6-2\times x\right):3,02=5,1\)
\(84,6-2.x=5,1.3,02\)
\(84,6-2.x=15,402\)
\(2.x=84,6-15,402\)
\(2.x=69,198\)
\(x=69,198:2\)
\(x=34,599\)
_____
8. \(x\times5=120:6\)
\(x.5=20\)
\(x=20:5\)
\(x=4\)
_____
9. \(\left(15\times24-x\right):0,25=100:0,25\)
\(\left(15.24-x\right):0,25=400\)
\(15.24-x=400.0,25\)
\(15.24-x=100\)
\(360-x=100\)
\(x=360-100\)
\(x=260\)
1,x-8+32=68
=>x-8=68-32=36
=>x=36+8=42
2,x+8+32=68
=>x+8=68-32=36
=>x=36-8=28
3,98-x+34=43
=>98-x=43-34=9
=>x=98-9=89
4,98+x-34=43
=>98+x=43+34=77
=>x=77-98=-21
5,x:5:4=800
=>x:20=800
=>x=800x20=16000
6,18+x=384:8=48
=>x=48-18=30
7,(84,6-2x):3,02=5,1
=>84,6-2x=5,1x3,02=15,402
=>2x=84,6-15,402=69,198
=>x=69,198:2=34,599
8,5x=120:6=20
=>x=20:5=4
9,(15x24-x):0,25=100:0,25=400
=>360-x=400x0,25=100
=>x=360-100=260.
\(x:0,25+6.x=12,81+7,19\)
\(x.4+6.x=20\)
\(x.\left(4+6\right)=20\)
\(x.10=20\)
\(x=20:10\)
\(x=2\)
~ Hok tốt ~
\(x:0,25+6\times x=12,81+7,19\)
\(\Leftrightarrow x:\frac{25}{100}+6\times x=20\)
\(\Leftrightarrow x:\frac{1}{4}+6\times x=20\)
\(\Leftrightarrow x\times4+6\times x=20\)
\(\Leftrightarrow x\times(4+6)=20\)
\(\Leftrightarrow x\times10=20\)
\(\Leftrightarrow x=20:10=2\)
Vậy x = 2