\(11\left(x-6\right)=4x+11\)
\(\Rightarrow11x-66=4x+11\)
\(\Rightarrow11x-4x=66+11\)
\(\Rightarrow7x=77\)
\(\Rightarrow x=11\)
Vậy x = 11
\(\left(3x+0,8\right)\div x+14,5=15\)
\(\Rightarrow\left(3x+0,8\right)\div x=15-14,5\)
\(\Rightarrow\left(3x+0,8\right)\div x=0,5\)
\(\Rightarrow3x+0,8=0,5x\)
\(\Rightarrow-2,5x=0,8\)
\(\Rightarrow x=0,8\div\left(-2,5\right)=\frac{-8}{25}\)
Vậy x = \(\frac{-8}{25}\)
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