12x+11=20
12x=20-11
12x=9
x=9:12
x=0,75
12x+11=20
12x=20-11
12x=9
x=9:12
x=3/4
=>x=0,75
12x+11=20
12x=20-11
12x=9
x=9/12
x=0,75
12x= 20-11=9
x=9:12=9/12=3/4
suy ra x=3/4
12x=20-11
12x=9\
x=9/12
x=0,75
12x+11=20
=>12x = 20-11
=>12x=9
=>x =12:9
=>x =0,75
Vậy x = 0,75
12x+11=20
12x=20-11
12x=9
x=9:12
Vậy x= 0,75
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12x+11=20
12x=20-11
12x=9
x=9:12
x=0,75
12x+11=20
12x=20-11
12x=9
x=9:12
x=0,75
12x+11 =20
12x =20-11
12x =9
x=9 /12
x=0.75
12x+11=20
12x =20-11
12x =9
x = 9:12
x=0,75
12x+11=20
12x=20-11
12x=9
x=9:12
x=0,75
12x+11=20
12x =20-11
12x =9
x =9:12
x =0,75
12x + 11 = 20
=> 12x= 20-11
=> 12x = 9
=> x = 9 : 12
=> x = 0,75
12x+11=20
12x=20-11
=9
x =9/12
x=0,75
vậy x=0,75