Question

ДАЮ 100 БАЛЛОВ!!! Очень срочно!! Решите уравнение! ​

Answer 1

б)

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

$6(3x - 1) - 5(5x + 1) = - 60$

$18x - 6 - 25x -5 = - 60$

$- 7x - 11 = - 60$

$- 7x = - 60 + 11$

$- 7x = - 49$

$x = 7$

г)

$\frac{3x + 6}{2} - \frac{7x - 14}{3} = \frac{x + 1}{9}$

$9(3x + 6) - 6(7x - 14) = 2(x + 1)$

$27x + 54 - 42x + 84 = 2x + 2$

$- 15x + 138 = 2x + 2$

$- 15x - 2x = 2 - 138$

$- 17x = - 136$

$x = 8$

е)

$\frac{3x - 1}{5} - \frac{5x + 1}{6} = \frac{x + 1}{8} - 3$

$24(3x - 1) - 20(5x + 1) = 15(x + 1) - 360$

$72x - 24 - 100x - 20 = 15x + 15 - 360$

$- 28x - 44 = 15x - 345$

$- 28x - 15x = - 345 + 44$

– 43х = – 31

х = 7

з)

3х + 3/4 – х + 2/4 – 2 = 8х – 3/6

3 (3х + 3) – 3 (х + 2) – 24 = 2 (8х – 3)

9х + 9 – 3х – 6 – 24 = 16х – 6

9х + 9 – 3х – 24 = 16х

6х – 15 = 16х

6х – 16х = 15

– 10х = 15

х = – 3/2