Question

СРОЧНО ПОМОГИТЕ Пожалуйста

Answer 1

379

$frac{x + 1}{2} - frac{5x}{12} = frac{3}{4} \ 6(x + 1) - 5x = 9 \ 6x + 6 - 5x = 9 \ x + 6 = 9 \ x$

$x = 3$

380.

$frac{2x + 1}{2} - frac{3}{4} = frac{7x}{8} \ 4(2x + 1) - 6 = 7x \ 8x + 4 - 6 = 7x \ 8x - 2 - 7x = 0$

$x - 2 = 0 \ x = 2$

381.

$frac{1}{3} (4x + 2) = 2x - 1 \ frac{4}{3} x + frac{2}{3} = 2x - 1$

$1 frac{1}{3} x + frac{2}{3} - 2x + 1 = 0 \ - 1 frac{2}{3} x + 1 frac{2}{3} = 0$

$- 1 frac{2}{3} x = - 1 frac{2}{3} \ x = - frac{5}{3} div ( - frac{5}{3} ) \ x = 1$

$382)2x - 12 = frac{1}{4} (3x + 2) \ 2x - 12 = frac{3}{4} x + frac{1}{2}$

$2x - 12 - frac{3}{4} x - frac{1}{2} = 0 \ 1 frac{1}{4} x - 12 frac{1}{2} = 0$

$x = frac{25}{2} div frac{5}{4} = frac{25}{2} times frac{4}{5} = 10$

$383) frac{1}{2} (5x + 2) = frac{7}{2} (x - 6) \ frac{5}{2} x + 1 = frac{7}{2} x - 21 \ 2.5x + 1 = 3.5x - 21$

$2.5x + 1 - 3.5x + 21 = 0 \ - x + 22 = 0 \ - x = - 22 \ x = 22$

$384) frac{4}{3} x - frac{32}{3} = 2x - frac{4}{3} \ 1 frac{1}{3} x - 10 frac{2}{3} = 2x - 1 frac{1}{3}$

$1 frac{1}{3} x - 10 frac{2}{3} - 2x + 1 frac{1}{3} = 0 \ - frac{2}{3} x - 9 frac{1}{3} = 0$

$x = frac{28}{3} div ( - frac{2}{3} ) = - frac{28}{3} times frac{3}{2} \ x = - 14$

Answer 2

Спасибо огромное, выручил меня)

Answer 3

выручила, не за что