Bài làm:
Ta có: \(52\times\left(x\div78\right)=3380\)
\(\Leftrightarrow x\div78=65\)
\(\Rightarrow x=5070\)
Học tốt!!!!
52x [X:78] =3380
3380:52=X:78
65=X:78
X=78 x 65
X =5070
52 x (x:78)=3380
x:78=3380:52
x:78=65
x =65 x 78
x = 5070
52x(X:78)=3380
X:78=3380:52
X:78=65
X =65x78
X =5070
52 x ( x : 78 ) = 3380
x : 78 = 3380 : 52
x : 78 = 65
x = 65 x 78
x = 5070
52 . ( x : 78 ) = 3380
x : 78 = 3380 : 52
x : 78 = 65
x = 65 . 78
x = 5070
vậy x = 5070
52 x ( x : 78 ) = 3380
x : 78 = 3380 : 52
x : 78 = 65
x = 65 x 78
x = 5070