4(x - 5) - 23 = 24.3
=> 4(x - 5) - 8 = 16.3
=> 4(x - 5) - 8 = 48
=> 4(x - 5) = 48 + 8
=> 4(x - 5) = 56
=> x - 5 = 56 : 4
=> x - 5 = 14
=> x = 14 + 5
=> x = 19
Vậy x = 19
\(4\times\left(x-5\right)-2^3=2^4\times3\)
\(\Rightarrow4\times\left(x-5\right)-8=16\times3\)
\(\Rightarrow4\times\left(x-5\right)-8=48\)
\(\Rightarrow4\times\left(x-5\right)=48+8\)
\(\Rightarrow4\times\left(x-5\right)=56\)
\(\Rightarrow x-5=56:4\)
\(\Rightarrow x-5=14\)
\(\Rightarrow x=14+5\)
\(\Rightarrow x=19\)
Vậy x = 19
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