5 x X + 4 x X + x = 400
X x ( 5 + 4 + 1 ) = 400
X x 10 = 400
X = 400 : 10
X = 40
Vậy: X = 40
Nhớ k cho mình nhé! Thank you!!!
5 x X +4 x X+x=400
X x (5+4+1) =400
X x 10=400
X=400 : 10
X=40
5 x X + 4 x X + X = 400
X x ( 5 + 4 + 2 ) = 400
X x 10 = 400
X = 400 : 10
X = 40
5xX+4xX+x=400
Xx(5+4+1) = 400
Xx10=400
x=400/10=40
5*x+4*x+x=400
suy ra:x*(5+4+1)=400
nên:x*10=400
nên x=40
vậy x=40
5xX+4xX+X=400
5xX+4xX+Xx1=400
(5+4+1)xX=400
10xX=400
X=400:10(tìm thừa số)
X=40