a) 40 x X = 1400
X = 1400:40
X = 35
b) x : 13 = 205
x = 205 x 13
x = 2665
a, 40 x \(x\) = 1400
\(x\) = 1400 : 40
\(x\) = 35
b, \(x\) : 13 = 205
\(x\) = 205 x 13
\(x\) = 2665
a, 40 x X = 1400
X = 1400 : 40
X = 35
b, X : 13 = 205
X = 205 x 13
X = 2665
a ,40 * x = 1400
x=1400 : 40
x=35
b ,x : 13 = 205
x= 205*13
x=2665
a,40 x \(x\)=1400
\(x\)=1400:40
\(x\)=35
b,\(x\):13=205
\(x\) =205 x 13
\(x\) 2665
40 * x = 1400 x : 13 = 205
x = 1400 : 40 x = 205 * 13
x = 35 x = 2665
a)40xX=1400
X=1400:40
X=35
b)X:13=205
X=205x13
X=2665
a,40 x \(x\)= 1400
\(x\)=1400 : 40
\(x\)= 35
b,\(x\): 13 = 205
\(x\) =205 x 13
\(x\) =2665
a)40*x=1400
x=1400:40
x=35
b)x:13=205
x=205*13
x=2665
đúng 100% tk nhé
a) 40 x x = 1400
x =1400 : 40
x =35
b) x : 13 = 205
x = 205 x 13
x = 2665
a,40.x=1400
=>x=1400:4
=>x=350
b,x:13=205
=>x=205.13
=>x=2665
40 x X=1400 X : 13 =205
X=1400:40 X=205x13
X=35 X=2665