=> X x ( 1,5 + 1 + 2,5 ) = 25
=> X x 5 = 25
=> X = 25 : 5
=> X = 5 (tm)
Ai k mk mk k lại !!
X x 1,5 + X + X x 2,5 =25
=X x (1,5+1+2,5)
X x 5=25
X=25:5
X=5
X x ( 1,5 + 1 + 2,5 ) = 25
X x 5 = 25
X = 25 : 5
X = 5
Vậy X = 5
X x 1,5 + X + X x 2,5 = 25
X x ( 1,5 + 1 + 2,5 ) = 25
X x 5 = 25
X = 25 : 5
X = 5
X x 1,5 + X + X x 2.5 = 25
X x 1.5 + X x1+X x 2.5 =25
X x (1.5+ 1 + 2.5 ) =25
X x 5 =25
X =25 : 5
X = 5
x.1,5+x+x.2,5=25
=> x.(1,5+1+2,5)=25
=> x.5 =25
=> x =25:5
=> x =5
Vậy x=5
X x 1,5 + X + X x 2.5 = 25
X x 1.5 + X x1+X x 2.5 =25
X x (1.5+ 1 + 2.5 ) =25
X x 5 =25
X =25 : 5
X = 5
X x 1,5 + X + X x 2.5 = 25
X x 1.5 + X x1+X x 2.5 =25
X x (1.5+ 1 + 2.5 ) =25
X x 5 =25
X =25 : 5
X = 5
X x 1,5 + X + X x 2,5=25
X x ( 1,5 +1 +2,5)=25
X x 5 = 25
X =25:5
X =5
Vậy X=5