2x+x=18
3x=18
x=6
9x+2x=48-4
11x=44
x=4
7x+2x=30-3
9x=27
x=3
-2x-3x= -18-7
-5x= -25
x= -25/-5
x=5
0.4x+0.8x=2.6-3.8
0.12x= -1.2
x= -1.2/0.12
x= -10
2x+x=18
3x=18
x=6
9x+2x=48-4
11x=44
x=4
7x+2x=30-3
9x=27
x=3
-2x-3x= -18-7
-5x= -25
x= -25/-5
x=5
0.4x+0.8x=2.6-3.8
0.12x= -1.2
x= -1.2/0.12
x= -10