\(450:\left(x+42\right)=9\)
\(\Rightarrow x+42=450:9\)
\(\Rightarrow x+42=50\)
\(\Rightarrow x=50-42\)
\(\Rightarrow x=8\)
450:(X+42)=9
x+42=450:9
x+42=50
x=52-42
x=8
450 : ( x + 42 ) = 9
x + 42 = 450 : 9
x + 42 = 50
x = 50 - 42
x = 8
450 : (X+42) = 9
x+42= 450 : 9
x+42= 50
x = 50-42
x = 8