Question

Упр 552 .Решите Уравнения .под номером 1), 2), 3).

Answer 1

1) 5(x+1) = -21; 5x + 5 = -21; 5x = -26; x = -26/5 = -5 1/5

2) 4(y+2) = 3(y-7); 4y + 8 = 3y - 21; y = -29

3) 5(3z + 6) = 7(-z-2); 15z + 30 = -7z - 14; 22z = -44; z = -2