2 Найдите корень уравнения: 1) 4(x-3) = 9 2) 2(x+9)=11 3) 5(x-3)=-4 4) 5(x-7)=-9

Решим каждое уравнение:

1. $$4(x-3) = 9$$
   $$4x - 12 = 9$$
   $$4x = 9 + 12$$
   $$4x = 21$$
   $$x = \frac{21}{4} = 5.25$$
2. $$2(x+9) = 11$$
   $$2x + 18 = 11$$
   $$2x = 11 - 18$$
   $$2x = -7$$
   $$x = -\frac{7}{2} = -3.5$$
3. $$5(x-3) = -4$$
   $$5x - 15 = -4$$
   $$5x = -4 + 15$$
   $$5x = 11$$
   $$x = \frac{11}{5} = 2.2$$
4. $$5(x-7) = -9$$
   $$5x - 35 = -9$$
   $$5x = -9 + 35$$
   $$5x = 26$$
   $$x = \frac{26}{5} = 5.2$$

Ответ: 1) 5.25; 2) -3.5; 3) 2.2; 4) 5.2