Question

Помогите пожалуйста 3 пример

Answer 1

Ответ:

$3) 3(5+\frac{x}{2}) = 4 + 2x\\\\ 15 + \frac{3x}{2} = 4 + 2x\\\\30 + 3x = 8 + 4x\\\\3x - 4x = 8 - 30\\\\-x = -22\\\\x = 22$

$3)\frac{2(3x-1)}{5} = 4 - \frac{x+2}{2}\\\\\frac{2(3x-1)}{5} + \frac{x+2}{2} = 4\\\\4(3x-1) + 5(x+2) = 40\\\\12x - 4 + 5x + 10 = 40\\\\12x + 5x = 40 - 10 + 4\\\\17x = 34\\\\x = 2$