\(3^2\left(x+4\right)-5^2=5.2^2\)
\(9\left(x+4\right)-25=5.4\)
\(9x+36-25=20\)
\(9x+11=20\)
\(9x=20-11\)
\(9x=9\)
\(x=9:9\)
\(x=1\)
\(3^2\left(x+4\right)-5^2=5.2^2\)
\(\Rightarrow9x+36=20+25\)
\(\Rightarrow9x+36=45\)
\(\Rightarrow9x=9\)
\(\Rightarrow x=1\)
Vậy x = 1
\(3^2\left(x+4\right)-5^2=5.2^2\)
\(\Leftrightarrow9\left(x+4\right)-25=5.4\)
\(\Leftrightarrow9x+36-25=20\)
\(\Leftrightarrow9x=20+25-36\)
\(\Leftrightarrow9x=9\Leftrightarrow x=1\)
Vậy \(x=1\)
Chúc bạn học tốt!!!
\(3^2\left(x+4\right)-5^2=5\cdot2^2\)
\(9\left(x+4\right)-25=5\cdot4\)
\(9x+36-25=20\)
\(9x+11=20\)
\(9x=20-11\)
\(9x=9\)
\(x=9:9\)
\(x=1\)
Vậy \(x=1\).
32(x+4)-52=5.22
9(x+4)-52=5.4
9(x+4)-52=20
9x+36-25=20
9x+11=20
9x=20-11
9x=9
x=9:9
x=1
0-11
