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\(\Rightarrow1225+x:5=2015\\ \Rightarrow x:5=790\\ \Rightarrow x=3950\)
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
a)\(162:x+216:x=6\)
⇔\(\left(162+216\right):x=6\)
⇔\(378:x=6\)
⇔\(x=63\)
b)\(602:x+123.2=253\)
⇔\(602:x+246=253\)
⇔\(602:x=7\)
⇔\(x=86\)
c)\(486:x-126:x=6\)
⇔\(\left(486-126\right):x=6\)
⇔\(360:x=6\)
⇔\(x=60\)
d)\(725:x+175:x=5\)
⇔\(\left(725+175\right):x=5\)
⇔\(900:x=5\)
⇔\(x=180\)
\(a.162:x+216:x=6\) \(b.602:x+123x2=253\)
\(\left(162+216\right):x=6\) \(602:x+246=253\)
\(378:x=6\) \(602:x=253-246\)
\(x=378:6=63\) \(602:x=7\)
\(x=602:7=86\)
\(c.486:x-126:x=6\) \(d.725:x+175:x=5\)
\(\left(486-126\right):x=6\) \(\left(725+175\right):x=5\)
\(360:x=6\) \(900:x=5\)
\(x=360:6=60\) \(x=900:5=180\)
a) 175+x*12=10175
x*12=10175-175
x*12=10000
x =10000/12
x =833.333...
b) x/26-157=14161
x/26 =14161+157
x/26 =14318
x =14318*26
x =372268
tranquynhnga
175 + 12x = 10175
12x = 10000
x = 10000/12
x = 2500/3
x/26 - 157 =14161
x/26 = 14318
x = 14318 . 26
x = 372268