(2x+5)*3=15
2x+5=15:3
2x+5=5
2x=5-5
2x=0
x=0
(8+4x)*2=48
8+4x=48:2
8+4x=24
4x=24-8
4x=16
x=16:4
x=4
(11-3x)*3=15
11-3x=15:3
11-3x=5
3x=11-5
3x=6
x=6:3
x=2
(5x+2)*5=60
5x+2=60:5
5x+2=12
5x=12-2
5x=10
x=10:5
x=2
(49-11x):3=9
49-11x=9*3
49-11x=27
11x=49-27
11x=22
x=22:11
x=2
(15+3x):3=6
15+3x=6*3
15+3x=18
3x=18-15
3x=3
x=1
(12+7x)*2=24
12+7x=24:2
12+7x=12
7x=12-12
7x=0
x=0
7(x+2)=49
x+2=49:7
x+2=7
x=7-2
x=5
15:(x+2)=5
x+2=15:5
x+2=3
x=3-2
x=1
21:(x-7)=7
x-7=21:7
x-7=3
x=3+7
x=10