Theo bài ra ta có : (x : 3 - 4) . 5 = 15
=> x : 3 - 4 = 15 : 5
=> x : 3 - 4 = 3
=> x : 3 = 3 + 4
=> x : 3 = 7
=> x = 7 . 3
=> x = 21
Vậy x = 21
Ta có:\(\left(x-3\right):4x5=15\)
\(\Rightarrow\left(x-3\right):4=15:5\)
\(\Rightarrow\left(x-3\right):4=3\)
\(\Rightarrow\left(x-3\right)=3\times4\)
\(\Rightarrow x-3=12\)
\(\Rightarrow x=15\)
k mk nha nguyenvankhoi196a đzai
Ta có :
( x : 3 - 4 ) . 5 = 15
=> x : 3 - 4 = 3
=> x : 3 = 7
=> x = 21