Question

Помогите 6 класс срочно!!!
а) -15х+31=-7+4х
б) 11-х=55+х
в)28-4х=19-х
г)-35-2х=42+9х

Answer 1

$- 15x + 31 = - 7 + 4x \ - 15x - 4x = - 7 - 31 \ - 19x = - 38 \ x = - 38 div ( - 19) \ x = 2$
$11 - x = 55 + x \ - x - x = 55 - 11 \ - 2x = 44 \ x = 44 div ( - 2) \ x = - 22$
$28 - 4x = 19 - x \ - 4x + x = 19 - 28 \ - 3x = - 9 \ x = - 9 div ( - 3) \ x = 3$
$- 35 - 2x = 42 + 9x \ - 2x - 9x = 42 + 35 \ - 11x = 77 \ x = 77 div ( - 11) \ x = - 7$