Question

Решите 30 минут осталось!!!!!!! ​

Answer 1

Ответ:

$\frac{x + 8}{3} - \frac{x - 2}{5} = 2 \\ 10(x + 8) - 6(x - 2) = 30 \times 2 \\ 10x + 80 - 6x + 12 = 60 \\ 4x + 92 = 60 \\ 4x = 60 - 92 \\ 4x = - 32 \\ x = - 32 \div 4 \\ x = - 8$

$(x + 6)(x - 1) - (x + 3)(x - 4) = 5x \\ {x}^{2} - x + 6x - 6 - {x}^{2} + 4x - 3x + 12 = 5x \\ x = - 6$

$(x - 2)(x - 11) - 2x(4 - 3x) = {x}^{2} - 11x - 2x + 22 - 8x + 12x = {x}^{2} - 9x + 22$

$(a + 6)(a - 1) + (a - 4)(a + 5) = {a}^{2} - a + 6a - 6 + {a}^{2} + 5a - 4a - 20 = 2 {a}^{2} + 6a - 26 = 2( {a}^{2} + 3a - 13)$