Facetimi o ecuatie random de aici ofer 10 puncte

Răspuns:
Ex.14 pc. a.
3(4x - 7) - 4(5 - 3x) = 10x - 13
12x - 21 - 20 + 12x = 10x - 13
24x - 41 = 10x -13
24x - 10x = 41 - 13
14x = 28
x = 28 /14
x = 2