PisicutaMaria22 PisicutaMaria22 02-11-2016 Matematică a fost răspuns Efectuati: a)-2x+3x+5 b)-2y-7y+9y c)2z-3z+7z d)10t+15t-25t e)x+2x+3x+...+10x f)x-2x+3x-4x+....+9x-10x