12х + 3y-9 = 2x + 13; 8x + 20 = 10 + 2(x + 2y); система уравнений - id1860808220220402 от zhanbolat2007 02.04.2022 15:35

Question

Алгебра: 12х + 3y-9 = 2x + 13; 8x + 20 = 10 + 2(x + 2y); система уравнений​

zhanbolat2007 · Accepted Answer

1) 10х + 4 = 7х + 19 10х - 7х = 19 - 4 3х = 15 х = 15 / 3 х = 5 2) 9 - 6х = 8х + 7 -6х - 8х = 7 - 9 -14х = -2 х = -2 / -14 х = 7 3) 5(х+2) = 1 5х + 10 = 1 5х = 1 - 10 х = -9 / 5 х = -1 4/5 = -1,8 4) 7(2х + 3) = 12х + 11 14х + 21 = 12х + 11 14х - 12х = 11 - 21 2х = - 10 х = -10 / 2 х = -5 5) 7(-4 + х) = 3х - 4 - 28 + 7х = 3х - 4 7х - 3х = -4 + 28 4х = 24 х = 24 / 4 х = 6 6) 2(х + 7) - 9 = -2х 2х + 14 - 9 = -2х 2х + 2х = 9 - 14 4х = -5 х = -5 / 4 х = -1,25 7) -3 (5 - х) = 11 + 2х -15 + 3х = 11 + 2х...

12х + 3y-9 = 2x + 13; 8x + 20 = 10 + 2(x + 2y);система уравнений​

MOGZ ответил

12х + 3y-9 = 2x + 13;
8x + 20 = 10 + 2(x + 2y);
система уравнений