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a: =>12x-64=32
=>12x=96
=>x=8
b: =>x-1=5
=>x=6
c: =>2^x*3=96
=>2^x=32
=>x=5
a) x-(-25+x)=13-x
⇒ x+25-x=13-x
⇒ 13-x=25
⇒ x= -12
b) 15-(30+x)=x-(27-l-8l)
⇒ 15-30-x=x-(27-8)
⇒ -15-x=x-19
⇒ -x-x=-19+15
⇒ -2x+4=0
⇒ -2x=-4
⇒ x=2
c) (12x-43).83=4.84
⇒ 12x.83-43.83=4.84
⇒ 6144x-32768=16384
⇒ 6144x=49152
⇒ x=8
a: Ta có: \(x-\left(-25+x\right)=13-x\)
\(\Leftrightarrow13-x=25\)
hay x=-12
b: Ta có: \(15-\left(30+x\right)=x-\left(27-\left|-8\right|\right)\)
\(\Leftrightarrow-15-x=x-19\)
\(\Leftrightarrow-2x=-4\)
hay x=2
c: Ta có: \(\left(12x-4^3\right)\cdot8^3=4\cdot8^4\)
\(\Leftrightarrow\left(12x-64\right)\cdot512=16384\)
\(\Leftrightarrow12x-64=32\)
hay x=8
\(\left(12x-43\right)\times83=4\times84\)
\(\Leftrightarrow12x-43=\dfrac{4\times84}{83}\)
\(\Leftrightarrow12x-43=\dfrac{336}{83}\)
\(\Leftrightarrow12x=\dfrac{3905}{83}\Leftrightarrow x=\dfrac{3905}{996}\)
\(15x+3-4x=17x-12x+43\)
\(\Leftrightarrow15x-4x+3=x\left(17-12\right)+43\)
\(\Leftrightarrow x\left(15-4\right)+3=5x+43\)
\(\Leftrightarrow11x+3=5x+43\)
\(\Leftrightarrow6x=40\)
\(\Leftrightarrow x=40\div6\)
\(\Leftrightarrow x=\frac{40}{6}\)
\(\Leftrightarrow x=\frac{20}{3}\)
\(12x-3x+1=937\)
\(\Rightarrow9x+1=937\)
\(\Rightarrow9x=937-1\)
\(\Rightarrow9x=936\)
\(\Rightarrow x=936\div9\)
\(\Rightarrow x=104\)
=> 12x - 3x = 937 - 1
=> 12x - 3x = 936
=> 9x = 936
=> x=936:9
=> x = 104
13x+1-(12x+1) = -43
<=>13x + 1 -12x-1=-43
<=>x=-43