x . 45 + x . 55 = 3600
x . (45 + 55) = 3600
x . 100 = 3600
x = 3600 : 100
x = 36
#Hoc tot!!!
~NTTH~
X x 45 + X x 55 = 3600
X x ( 45+55 ) =3600
X x 100 =3600
X =3600 : 100
X =36
X x 45 + X x 55 = 3600
X x ( 45 + 55 )= 3600
X x 100= 3600
X= 3600: 100
x=36