8,75 * x + 1,25 * x = 20
x * ( 8,75 + 1,25 ) = 20
x * 10 = 20
x = 2
8.75 x X + 1.25 x X = 20
X( 8.75 + 1,25) = 20
10x= 20
x= 20 : 10
x= 10
8,75xX+1,25xX=20
Xx(8,75+1,25)=20
Xx10=20
X=2
8,75 x X + 1,25 x X =20
X x(8,75 + 1,25) =20
X x 10 =20
X =20:10
X =2
8,75 x X + 1,25 x X = 20
X x ( 8,75 + 1,25) = 20
X x 10 = 20
X = 20 : 10
X = 2
Vậy X = 2