8.9x+17.54=5.4x+2.84
8,9x+17,54=5,4x+2,84
8,9x-5,4x=-17,54+2,84
3,5x=-14,7
x=-14,7:3,5
x=- 4,2
8.9x-5.4x=2.84-17.54
3.5x=-14.7
x=-14.7/3.5
x=4.2