Question

ПОМОГИТЕ!!!!ПОЖАЛУЙСТА!!!!!!

Answer 1

Ответ:

1)

$9 - 4x = 3x - 40 \\ - 4x - 3x = - 40 - 9 \\ - 7x = - 49 \\ x = 7$

2)

$0.6x + 4.4 = - 0.8x + 5.8 \\ 0.6x + 0.8 x = 5.8 - 4.4 \\ 1.4 x = 1.4 \\ x = 1$

3)

$\frac{2}{3} x + 15 = \frac{1}{6} x + 10 \\ \frac{2}{3} x - \frac{1}{6} x = 10 - 15 \\ \frac{4 - 1}{6} x = - 5 \\ \frac{5}{6} = - 5 \\ x = - 6$

4)

$(6x + 8) - (8x + 14) = 9 \\ 6x + 8 - 8x - 14 = 9 \\ - 2x - 6 = 9 \\ - 2x = 9 + 6 \\ - 2x = 15 \\ x = - 7.5$

5)

$4(3x - 1) = 2(6x - 8) + 20 \\ 12x - 4 = 12x - 16 + 20 \\ 12x - 4 = 12x + 4 \\ 12x - 12x = 4 + 4 \\ 0 = 8$

уравнение ложно