Зная, что |а|=3, |в|=1, |с|=4 и а+в+с=0, вычислите ав+вс+саответ: -13​

А) 3х + х + 2 = 18                 б) 3х - 12 = х 4х = 18 - 2                             3х - х = 12 4х = 16                                 2х = 12 х = 16 : 4                               х = 12 : 2 х = 4                                     х = 6 в) 2х + 6 = 4х - 2                   г) - 4х - 4 = 2х + 8 2х - 4х = - 2 - 6                     - 4х - 2х = 8 + 4 - 2х = - 8                               - 6х = 12 х = - 8 : (-2)                           х = 12 : (-6) х = 4                                      х = - 2

Simplifying 3x + -1py + -3y + px = 0 reorder the terms: px + -1py + 3x + -3y = 0 solving px + -1py + 3x + -3y = 0 solving for variable 'p'. move all terms containing p to the left, all other terms to the right. add '-3x' to each side of the equation. px + -1py + 3x + -3x + -3y = 0 + -3x combine like terms:   3x + -3x = 0 px + -1py + 0 + -3y = 0 + -3x px + -1py + -3y = 0 + -3x remove the zero: px + -1py + -3y = -3x add '3y' to each side of the equation. px + -1py + -3y + 3y = -3x + 3y combine like terms: -3y + 3y = 0 px + -1py + 0 = -3x + 3y px + -1py = -3x + 3y reorder the terms: px + -1py + 3x + -3y = -3x + 3x + 3y + -3y combine like terms: -3x + 3x = 0 px + -1py + 3x + -3y = 0 + 3y + -3y px + -1py + 3x + -3y = 3y + -3y combine like terms: 3y + -3y = 0 px + -1py + 3x + -3y = 0 the solution to this equation could not be determined.