125 - ( x + 48 ) = 102
=> 125 - ( x + 48 ) = 100
=> (x + 48 ) = 125 - 100
x + 48 = 25
=> x = -23
120 - x : 4 = 34 : 311
120 - x : 4 = ( -3 7 )
=> x : 4 = 120 - ( - 2187 )
x : 4 = 2307
=> x = 9228
k nha
Ta có: \(125-\left(x+48\right)=10^2\)
\(\Rightarrow125-\left(x+48\right)=100\)
\(\Rightarrow x+48=125-100=25\)
\(\Rightarrow x=25-48=-23\)
Vậy x = -23
\(120-x:4=3^4:3^{11}\)
\(\Rightarrow120-x:4=\frac{1}{2187}\)
\(\Rightarrow x:4=120-\frac{1}{2187}=120\) ( khoanh tròn)
\(\Rightarrow x=120.4=480\)
Vậy x = 480