Question

Решите 3 номера срочно!!!!

Answer 1

$(2 \times 0.4 + 5) \div ( - 5 \times 0.4) = 5.8 \div ( - 2) = - 2.9 \\ x = - 1 \\ a = 0 \\( (b - c) \times (b + c)) \div b(b - c) = (b + c) \div b$

Answer 2

(b-c)(b+c)/b(b-c)=(b+c)/b=1+c/b