Question

пж помогите сам.робота на фото​

Answer 1

Ответ:

$1)1)2x - 10 = 0 \\ 2x = 10 \\ x = 5 \\ 2)5y + 15 = 0 \\ 5y = - 15 \\ y = - 3$

$3)3a - 10 = 5 \\ 3a = 5 + 10 \\ 3a = 15 \\ a = 5$

$4)4y = 10 - y \\ 4y + y = 10 \\ 5y = 10 \\ y = 2$

$2)1) - a + 25 = - 1 + 12a \\ - a - 12a = - 25 - 1 \\ - 13a = - 26 \\ a = 2$

$3)1) \frac{1}{14} y - 1 = \frac{1}{4} y - \frac{1}{7} y \\ 2y - 28 = 7y - 4y \\ 2y - 3y = 28 \\ - y = 28 \\ y = - 28$

$2)4a - 4\frac{1}{6} = - 3 \frac{5}{18} - 1 \frac{1}{3}a \\ 4a - \frac{25}{6} = - \frac{59}{18} - \frac{4}{3} a \\ 72a - 75 = - 59 - 24a \\ 72a + 24a = - 59 + 75 \\ 96a = 16 \\ a = \frac{16}{96} \\ a = \frac{1}{6}$

$4)1)4(x - 4) + 1 = 2(2x - 1) \\ 4x - 16 + 1 = 4x - 2 \\ 4x - 4x = - 2 + 15 \\ 0 = 0$

$2)3(x - 5) + x = 2(2x - 1) - 13 \\ 3x - 15 + x = 4x - 2 - 13 \\ 4x - 4x = - 15 + 15 \\ 0 = 0$

$3)2(x - 1) + x = 2x - 10 \\ 2x - 2 + x = 2x - 10 \\ 3x - 2x = - 10 + 2 \\ x = - 8$

$2)5b + 4 = 3b - 12 \\ 5b - 3b = - 12 - 4 \\ 2b = - 16 \\ b = - 8$