Question

Найдите корень уравнений.

Answer 1

$frac{2 - 7y}{6} + frac{4y + 7}{3} = - frac{y}{2} | times 6 \ 2 - 7y + 2(4y + 7) = - 3y \ 2 - 7y + 8y + 14 = - 3y \ 16 + y = - 3y \ y + 3y = - 16 \ 4y = - 16 \ y = - 4 \ frac{7y - 1}{12} - frac{y + 1}{4} = frac{2y + 5}{ 3} | times 12 \ 7y - 1 - 3(y + 1) = 4(2y + 5) \ 7y1 - 3y - 3 = 8y + 20 \ 4y - 4 = 8y + 20 \ 4y - 8y = 20 + 4 \ - 4y = 24 \ y = - 6$