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X x ( 27 + 30 +43 ) = 210500
X x 100 = 210500
X = 210500 : 100
X = 2105
X x (27 +30+43) =210500
X x 100 = 210500
X =210500 : 100
X = 215
A x 27 + A x 30 + A x 43 =210 500
=> A x ( 27 + 30 + 43 ) = 210 500
=> A x 100 = 210 500
=> A = 210 500 : 100
=> A = 2 105
Vậy A = 2 105
Xx27+Xx30+Xx43=210500
Xx(27+30+43)=210500
Xx100+210500
X=210500:100
X=2105
X x 27 + X x 30 + X x 43 = 210500
X x ( 27 + 30 + 43 ) = 210500
X x 100 = 210500
X = 210500 : 100
X = 2105
X x (27 + 30 + 43)=210500
X x 100 =210500
X=210500:100
X=2105
a,+) 4/x=12/15
=>15*4=12*x
=>60=12*x
=>x=5;có 4/x=y/45
=>4/5=y/45
=>36/45=y/45
=>y=36
Vậy x=5:y=36
b,3/x=1/y=6/24
=>3/x=1/y=1/4
có: 1/y=1/4
=>y=4
có: 1/4=3/x
=>1x=3*4
=>x=12
Vây x=12
y=4
hok tot
a) \(\frac{4}{5}=\frac{12}{15}=\frac{36}{45}\)
Tự giải quyết nốt =))
yx(15+35)=150
yx50 =150
y =150:50=3
yx5=713-173
yx5=540
y =540:5=108
\(a,y\times27+y\times30+y\times44-y=10500\\\Rightarrow y\times\left(27+30+44-1\right)=10500\\ \Rightarrow y\times100=10500\\ \Rightarrow y=10500:100\\ \Rightarrow y=105\\ b,y\times285+115\times y=400\\ \Rightarrow y\times\left(285+115\right)=40\\ \Rightarrow y\times400=400\\ y=400:400\\ \Rightarrow y=1\)
\(a,\Rightarrow y\times\left(27+30+44-1\right)=10500\\ \Rightarrow y\times100=10500\\ \Rightarrow y=105\\ b,\Rightarrow y\times\left(285+115\right)=400\\ \Rightarrow y\times400=400\\ \Rightarrow y=1\)
a) \(y\times27+y\times30+y\times43=210500\)
\(y\times\left(27+30+43\right)=210500\)
\(y\times100=210500\)
\(y=210500\div100\)
\(y=2105\)
b) \(15\times y+85\times y=300\)
\(y\times\left(15+85\right)=300\)
\(y\times100=300\)
\(y=300\div100\)
\(y=3\)
\(a,y\times27+y\times30+y\times43=210500\)
\(\Rightarrow y\times\left(27+30+43\right)=210500\)
\(\Rightarrow y\times100=210500\)
\(\Rightarrow y=210500:100=2105\)
\(b,15\times y+85\times y=300\)
\(\Rightarrow y\times\left(15+85\right)=300\)
\(\Rightarrow y\times100=300\)
\(\Rightarrow y=300:100=3\)