128 - 3.(x+4)= 23
giúp toy vs =)
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\(6\cdot x-5=613\)
\(6\cdot x=613+5\)
\(6\cdot x=618\)
\(x=618\div6\)
\(x=103\)
Vậy \(x=103\)
\(12\cdot x+3\cdot x=30\)
\(x\cdot\left(12+3\right)=30\)
\(x\cdot15=30\)
\(x=30\div15\)
\(x=2\)
Vậy \(x=2\)
\(125-25\cdot\left(x-1\right)=100\)
\(25\cdot\left(x-1\right)=125-100\)
\(25\cdot\left(x-1\right)=25\)
\(x-1=25\div25\)
\(x-1=1\)
\(x=1+1\)
\(x=2\)
Vậy \(x=2\)
\(\left(x-2\right)\cdot\left(x-14\right)=0\)
\(\Rightarrow\) \(x-2=0\) hoặc \(x-14=0\)
TH1: \(x-2=0\) TH2: \(x-14=0\)
\(x=0+2\) \(x=0+14\)
\(x=2\) \(x=14\)
Vậy \(x=2\) hoặc \(x=14\)
\(128-3\cdot\left(x+4\right)=23\)
\(3\cdot\left(x+4\right)=128-23\)
\(3\cdot\left(x+4\right)=105\)
\(x+4=105\div3\)
\(x+4=35\)
\(x=35-4\)
\(x=31\)
Vậy \(x=31\)
12.x+3.x=30
x.(12+3)=30
x.15=30
x =30:15
x =2
125-25.(x-1)=100
25.(x-1)=125-100
25.(x-1)=25
x-1=25:25
x-1=1
x =1+1
x=2
(x-2).(x-14)=0
x=14
128-3.(x+4)=23
3.(x+4)=128-23
3.(x+4)=105
x+4=105:3
x+4=35
x = 35+4
x =39
\(\sqrt{\dfrac{72x}{128}}=\dfrac{3}{4}\)
\(\Leftrightarrow x\cdot\dfrac{9}{16}=\dfrac{9}{16}\)
hay x=1
\(\left(3x-4\right)^7=128\)
\(\left(3x-4\right)^7=2^7\)
\(3x-4=2\)
\(3x=2+4\)
\(3x=6\)
\(x=2\)
3x(x+4)=128-23
3x(x+4)=105
x+4=105:3
x+4=35
x=35-4
x=31
cich dung cho minh di
128 - 3 (x+4)=23
3 (x+4)=128-23
3 (x+4)=105
x+4=105:3
x+4=35
x=35-4
x=31
128 - 3 (x+4)=23
3 (x+4)=128-23
3 (x+4)=105
x+4=105:3
x+4=35
x=35-4
x=31
128 - 3 ( x + 4 ) = 23
3( x + 4 ) = 128 - 23 = 105
x + 4 = 105 : 3 = 35
x = 35 - 4 = 31
128 - 3(x + 4) = 23
\(\Leftrightarrow\)3(x + 4) = 128 - 23 = 105
\(\Leftrightarrow\)x + 4 = 105 : 3 = 35
\(\Leftrightarrow\)x = 35 - 4 = 31
Vậy x = 31
128-3.(x+4)=23
3.(x+4)=128-23
3.(x+4)=105
x+4=105:3
x+4=35
x=35-4
x=31
TL:
X bằng 31
k cho mk nhé!
~HT~