1) 3x-(4+2x)=11
3x - 4 - 2x = 11
3x - 2x = 11+4
x = 15
Vậy x = 15.
2) 4x+5=11+2x
4x - 2x = 11 - 5
2x = 6
x = 6 : 2
x = 3
Vậy x = 3.
3) 7x-17=31+x
7x - x = 31 + 17
6x = 48
x = 48 : 6
x = 8
Vậy x = 8
# HOK TỐT #
\(3x-\left(4+2x\right)=11\)
\(3x-4-2x=11\)
\(x-15=0\)
\(x=15\)
\(4x+5=11+2x\)
\(2x-6=0\)
\(2x=6\)
\(x=3\)
Bn lm phần c đi , cố lên !
1) 3x-(4+2x)=11
3x-4-2x=11
3x-2x=11+4
x=15
2) 4x+5=11+2x
4x-2x=11-5
2x=6
x=6:2
x=3
3) 7x-17=31+x
7x-x=31+17
6x=48
x=48:6
x=8
1) 3x-(4+2x)=11
3x-4-2x=11
3x-2x=11+4
x=15
Vậy x=15
2) 4x+5=11+2x
4x-2x=11-5
2x=6
x=6:2
x=3
Vậy x=3
3) 7x-17=31+x
7x-x=31+17
6x=48
x=48:6
x=8
Vậy x=8