Question

помогите пожалуйста номер 926 все 4

Answer 1

$frac{x}{3} + frac{x}{2} = frac{x}{6} + 1 \ 2x + 3x = x + 6 \ 5x = x + 6 \ 4x = 6 \ x = 1.5$
$frac{y}{2} - frac{y}{8} = frac{y}{4} - 1 \ 4y - y = 2y - 8 \ 3y = 2y - 8 \ y = - 8$
$frac{5x}{12} - frac{4x}{15 } = frac{x}{20} + 1 \ 25x - 16x = 3x + 60 \ 9x = 3x + 60 \ 6x = 60 \ x = 10$
$frac{x}{3} - frac{2x}{9} = frac{x}{6} + frac{1}{2} \ 6x - 4x = 3x + 9 \ 2x = 3x - 9 \ - x = - 9 \ x = 9$

Answer 2

1) х/3 + х/2 = х/6 + 1
     2х/6 + 3х/6 = х/6 + 1
     5х/6 - х/6 = 1
     4х/6 = 1
     2х/3 = 1
     2х = 1 * 3
     2х = 3
     х = 3/2
     х = 1,5
2) у/2 - у/8 = у/4 - 1
    4у/8 - у/8 = у/4 - 1
    3у/8 = у/4 - 1
    3у/8 - у/4 = - 1
    3у/8 - 2у/8 = - 1
    у/8 = - 1
    у = - 1 * 8
    у = - 8
3) 5х/12 - 4х/15 = х/20 + 1
    25х/60 - 16х/60 = х/20 + 1
    9х/60 = х/20 + 1
    3х/20 = х/20 + 1
    3х/20 - х/20 = 1
    2х/20 = 1
    х/10 = 1
     х = 1 * 10
     х  = 10
4) х/3 - 2х/9 = х/6 + 1/2
    3х/9 - 2х/9 = х/6 + 1/2
     х/9 = х/6 + 1/2
     х/9 - х/6 = 1/2
     2х/18 - 3х/18 = 1/2
     - х/18 = 1/2
     -х = 1/2 * 18
     -х = 9
      х = - 9