Question

Быстрее пожайлуста и правильно

Answer 1

1)

$16x - 3 = 8x - 43 \\ 16x - 8x = - 43 + 3 \\ 8x = - 40 \\ x = - 5$

#3

1)

$- 0.9 \times (x - 4) - 3.3 = 0.6 \times (2 - x) \\ - 0.9x + 3.6 - 3.3 = 1.2 - 0.6x \\ - 0.9x + 0.3 = 1.2 - 0.6x \\ - 0.9x + 0.6x = 1.2 - 0.3 \\ - 0.3x = 0.9 \\ x = - 3$

2)

$\frac{x + 3}{3} = \frac{3 - x}{8} \\ 8x + 24 = 9 - 3x \\ 8x + 3x = 9 - 24 \\ 11 x = - 15 \\ x = - \frac{15}{11}$

#5

$(7x - 2) \times (7x + 1.4) = 0 \\ 49x^{2} + 9.8x - 14x - 2.8 = 0 \\ 49x ^{2} - 4.2x - 2.8 = 0$