725 : x = 8 {dư 5 }
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8.725 x 3.267 + 3.267 x 1.725 - 12.627
= 3.267 x ( 8.725 + 1.725 ) - 12.627
= 3.267 x 10.45 - 12.627
= 34.14015 - 12.627
= 21.51315
8,725 x 3,267 + 3,267 x 1,725 - 12,627 = (8,725 + 1,725) x 3,267 - 12,627
= 10,45 x 3,267 - 12,627
= 34,14015 - 12,627
= 21,51315
5x + 5 x+1 = 5x + 5x . 5 = 5x .(1+5) = 725
=> 5x = 725 : 6 = \(\frac{725}{6}\)
mà 5x \(\in\)Z
=> x ko có giá trị
5^x+5^x+5=725
5^x.(1+5)=725
5^x=725:6(vo li)
=>xthuoc rong
\(\dfrac{3}{5}\times y=\dfrac{4}{7}\)
\(y=\dfrac{4}{7}\div\dfrac{3}{5}\)
\(y=\dfrac{4}{7}\times\dfrac{5}{3}\)
\(y=\dfrac{20}{21}\)
a: =1250:25=50
b: =234(45+55)+234=23400+234=23634
c: =1000x1000=1000000
a, x : 25 = 1205 : 5
x : 25 = 241
x = 241 x 25
x = 6025
b, 2018 – x = 425 +725
2018 – x = 1150
x = 2018 – 1150
x = 868
\(a,60-3.\left(x-2\right)=51\)
\(3.\left(x-2\right)=60-51\)
\(3.\left(x-2\right)=9\)
c \(x-2=9:3\)
\(x-2=3\)
\(x=3+2\)
\(x=5\)
\(b,541+\left(218-x\right)=725\)
\(218-x=725-541\)
\(218-x=184\)
\(x=218-184\)
\(x=34\)
\(c,3.\left(5x-13\right)=3^4\)
\(3.\left(5x-13\right)=81\)
\(5x-13=81:3\)
\(5x-13=27\)
\(5x=27+13\)
\(5x=40\)
\(x=8\)
\(d,\left(2x-7\right)-\left(x+135\right)=0\)
\(2x-7-x-135=0\)
\(x-142=0\)
\(x=0+142\)
\(x=142\)
a,486:x-126:x=6
=>(486-126):x=6
=>360:x=6
=>x=360:6
=>x=60
b,725:x+175:x=5
=>(725+175):x=5
=>900:x=5
=>x=900:5
=>x=180
486:x-126:x=6
(486-126):x=6
360:x=6
x=360:6
x=60
725:x+175:x=5
(725+175):x=5
900:x=5
x=900:5
x=180
a) 162 : 𝑥 + 216 : 𝑥 = 6
(162 + 216) : x = 6
378 : x = 6
x = 378 : 6
x = 63
b) 602 : x + 123 x 2 = 253
602 : x + 246 = 253
602 : x = 253 - 246
602 : x = 7
x = 602 : 7
x = 86
c) 486 : x - 126 :x = 6
(486-126) : x = 6
360 : x = 6
x = 360 : 6
x = 60
d) 725 : x + 175 : x = 5
(725 + 175) : x = 5
900 : x = 5
x = 900 : 5
x = 180
725 : x = 8 dư 5
x = (725 - 5) : 8
x = 720 : 8
x = 90
~HT~
Đáp án :
x = 90
Giải thích :
725 : x = 8 ( dư 5 )
x = ( 725 - 5 ) : 8
x = 720 : 8
x = 90