1.5=18−0.09x−0.180.9
0.09x−0.180.9=16.5
0.09x−0.18=14.85
0.09x=15.03
x=15.030.09
x=167
0.26x+0.09x=8-0.3x
Solve : 0.25+1.95x=0.9.