Question

3(2,5х-4,2)-2(5х-7) $leq$6-3х

Answer 1

3(2,5х-4,2)-2(5х-7) 6-3х
7.5x-12.6 - 10x+14 - 6+3x 0
0.5x - 4.6 0
0,5x   4.6
x 4,6 0,5
x    9,5
<-------------------|
---------------------0-------------------------------
                   9.5

Answer 2

спасибо