(3,6x + 2,5) - (1,8x + 2,3) = 1,6x
3,6х+2,5-1,8х-2,3=1,6х
3,6х-1,8х-1,6х=-2,5+2,3
0,2х=-0,2
х=-1
Ответ. х=-1
3.6х+2,5-1,8х-2,3=1,6х
1,8х+0,2=1,6х