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2x-12≤3-x
2x+x≤3+12
3x≤15/3
x≤5
----------------->kolko zamalowane
---------0-----5------------------->
b)(x-3)-(2-x)<8
x-3-2+x<8
x+x<8+3+2
2x<13/2
x<6,5
------------------------->kolko nie zamalowane
--------0------6,5-------------------->
2x-12≤3-x
2x+x≤3+12
3x≤15 /:3
x≤5