a) 3(x-4)+2,6=5,9
\(3\left(x-4\right)=3,3\)
\(x-4=\frac{11}{10}\)
\(x=\frac{51}{10}\)
b)|1+x|+3=3
\(\Rightarrow|1+x|=0\)
\(1+x=0\)
\(x=-1\)
c) \(\left(\frac{-2}{3}\right)^x=\frac{-8}{27}\)
\(\left(\frac{-2}{3}\right)^x=\left(\frac{-2}{3}\right)^3\)
\(x=3\)
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