Составьте по рисунку 2.19 уравнение и решите его.
1) 75-x = 46 x = 75-46 x = 29 2) 54+x+32 = 96 x+86 = 96 x = 96-86 x = 10 3) 78+3x-25 = 104 3x+53 = 104 3x = 104-53 3x = 51 x = 51:3 x= 17 4) x+3x+3x+29 = 155 7x+29 = 155 7x = 155-29 7x = 126 x = 126:7 x = 18