Question

решите уравнение пожалуйста
5*(x-1)=14-2*(7-2x)

Answer 1

$5(x - 1) = 14 - 2(7 - 2x)\\5x^{2} -5x =14 -14 +4x\ \5x^{2} - 5x = 4x\\5x^{2} - 5x- 4x = 0\\5x^{2} - 9x = 0\\x(5x-9) = 0\\x= 0\5x-9 = 0\\x_{1} = 0\x_{2} = frac{9}{5}$