Question

2 mũ x cộng 3 trừ 2 mũ x bằng 112

Answer 1

\(2^{x+3}-2^x=112\)

\(\Rightarrow2^x\left(8-1\right)=112\) 

\(\Rightarrow2^x=16=2^4\)

\(\Rightarrow x=4\)

Vậy x=4

Answer 2

Bài làm

      \(2^{x+3}-2^x=112\)

\(\Rightarrow2^x.2^3-2^x=112\)

\(\Rightarrow2^x\left(2^3-1\right)112\)

\(\Rightarrow2^x.7=112\)

\(\Rightarrow2^x=112:7\)

\(\Rightarrow2^x=16\)

\(\Rightarrow2^x=4^4\)

\(\Rightarrow x=4\)

Vậy \(x=4\)

# Học tốt #

Answer 3

\(2^{x+3}-2^x=112\)

\(\Rightarrow2^x\times2^3-2^x=112\)

\(\Rightarrow2^x\times\left(8-1\right)=112\)

\(\Rightarrow2^x=112\div7\)

\(\Rightarrow2^x=16\)

\(\Rightarrow2^x=2^4\)

\(\Rightarrow x=4\)

~Std well~

#Lâm