Tìm x biết d) ( x + 5 ) : 3 − 11 = 4 .
Giải thích
d) \(\left( {x + 5} \right):3 - 11 = 4\)
\(\left( {x + 5} \right):3 = 4 + 11\)
\(\left( {x + 5} \right):3 = 15\)
\(x + 5 = 15 \cdot 3\)
\(x + 5 = 45\)
\(x = 45 - 5\)
\(x = 40\).
Vậy \(x = 40\).
d) \(\left( {x + 5} \right):3 - 11 = 4\)
\(\left( {x + 5} \right):3 = 4 + 11\)
\(\left( {x + 5} \right):3 = 15\)
\(x + 5 = 15 \cdot 3\)
\(x + 5 = 45\)
\(x = 45 - 5\)
\(x = 40\).
Vậy \(x = 40\).