83 - 5 ( x + 4 ) = 28
5 ( x + 4 ) = 83 - 28
5 ( x + 4 ) = 55
x + 4 = 55 : 5
x + 4 = 11
x = 11 - 4
x = 7
=>5*(x+4)=83-28=55
=>x+4=\(\frac{55}{5}\)=11
=>x=11-4=7
\(83-5\left(x+4\right)=28\)
\(5x+20=83-28\)
\(5x=55-20\)
\(5x=35\)
\(x=7\)
vậy \(x=7\)
83-5(x+4)=28
\(\Rightarrow83-28=5\left(x+4\right)\)
\(\Rightarrow5\left(x+4\right)=55\Rightarrow x+4=11\)
\(\Rightarrow x=7\)
Vậy...............
\(83-5\left(x+4\right)=28\)
\(5\left(x+4\right)=83-28\)
\(5\left(x+4\right)=55\)
\(x+4=55:5\)
\(x+4=11\)
\(\Rightarrow\) \(x=11-4\)
\(\Rightarrow\) \(x=7\)
học vui ^^
\(83-5\left(x+4\right)=28\)
\(5x+20=83-28=55\)
\(5x=55-20=35\)
\(x=35:5=7\)
Vậy x = 7
