x + 2x + 3x = 180
x(1 + 2 + 3) = 180
x . 6 = 180
x = 180 : 6
x = 30.
[3x - 8] + 6 = 25
3x - 8 = 25 - 6
3x - 8 = 19
3x = 27
x = 27 : 3
x = 9.
x + 2x + 3x = 180
6x = 180
x = 180 : 6
x = 30
Vậy x = 30.
(3x - 8) + 6 = 25
3x - 8 = 25 - 6
3x - 8 = 19
3x = 19 + 8
3x = 27
x = 27 : 3
x = 9
Vậy x = 9.
\(x+2x+3x=180\)
\(\left(1+2+3\right)\times x=180\)
\(6\times x=180\)
\(x=180:6\)
\(x=30\)
\(\left(3x-8\right)+6=25\)
\(3x-8=25-6\)
\(3x=19+8\)
\(3x=27\)
\(x=27:3\)
\(x=9\)
Học tốt
x + 2x + 3x = 180
1x + 2x + 3x = 180
(1 + 2 + 3) .x = 180
6x = 180
x = 180 : 6
x = 30
Vậy x = 30
[3x - 8] + 6 = 25
3x - 8 = 25 - 6
3x - 8 =19
3x = 19 + 8
3x = 27
x = 27 : 3
x = 9
Vậy x = 9
cảm ơn các bạn
x+2x+3x=180
x×(1+2+3)=180
x×6=180
x=180:6
x=30
vậy x=30
(3x-8)+6=25
(3x-8)=25-6
(3x-8)=19
3x=19+9
3x=27
x=27:3
x=9
vậy x=9
a, x . ( 1+ 2+ 3) = 180
x. 6 = 180
x = 180: 6
x= 30 Vậy x= 30
b, ( 3x-8) + 6 =25
3x-8 = 25- 6
3x-8 = 19
3x = 27
x = 9 Vậy x= 9