Question

СРОЧНО!!! Помогите решить уравнения! ​

Answer 1

Объяснение:

1)

$2(x - 3) - 5(x - 7) = 5 - (x + 6) \\ 2x - 6 - 5x + 35 = 5 - x - 6 \\ 2x - 5x + 35 = 5 - x \\ - 3x + 35 = 5 - x \\ - 3x + x = 5 - 35 \\ - 2x = 5 - 35 \\ - 2x = - 30 \\ x = 15$

2)

$\frac{4x - 1}{3} = \frac{2x}{3} + 2 \\ 4x - 1 = 2x + 6 \\ 4x - 2x = 6 + 1 \\ 2x = 6 + 1 \\ 2x = 7 \div 2 \\ x = \frac{7}{2} = 3 \frac{1}{2} = 3.5$

3)

$\frac{3x - 1}{5} = - 4 - \frac{x + 2}{5} \\ 3x - 1 = - 20 - (x + 2) \\ 3x - 1 = - 20 - x - 2 \\ 3x - 1 = - 22 - x \\ 3x + x = - 22 + 1 \\ 4x = - 22 + 1 \\ 4x = - 21 \div 4 \\ x = \frac{21}{4} = - 5 \frac{1}{4 } = - 5.25$