Question

3+x=-8
(35+x)-12=27
2 mũ x+15=31

Answer 1

a: x=-11

b: x=4

Answer 2

\(a,\Rightarrow x=-8-3=-11\\ b,\Rightarrow35+x-12=27\\ \Rightarrow x=4\\ c,\Rightarrow2^x=16=2^4\Rightarrow x=4\)

Answer 3

a/ \(3+x=-8\Rightarrow x=-8-3=-11\)

 

b/ \(\begin{matrix}\left(35+x\right)-12=27\\35+x=27+12\\35+x=39\\x=39-35\\x=4\end{matrix}\)

 

c/ \(\begin{matrix}2^x+15=31\\2^x=31-15\\2^x=16\\2^x=2^4\\x=4\end{matrix}\)

 

Answer 4

a:x=-11     b:x=4      =))