«Решение уравнений» 1. (4 – х) + 2 (х – 3) = –13; 2. (2 – х) + 3 (х – 3) = –13; 3. 3 (5 –х) + 13 = 4 (3х – 8). 4. 2 (3 + 2х) = 4 (3 – 2х) + 24.

1) (4 - х) + 2*(х - 3) = -13 2) (2 - х) + 3*(х - 3) = -13 4 - х + 2х - 6 = -13 2 - х + 3х - 9 = -13 -х + 2х = -13 - 4 + 6 -х + 3х = -13 - 2 + 9 х = -11 2х = -6 х = -6 : 2 х = -3 3) 3*(5 - х) + 13 = 4*(3х - 8) 4) 2*(3 + 2х) = 4*(3 - 2х) + 24 15 - 3х + 13 = 12х - 32 6 + 4х = 12 - 8х + 24 -3х - 12х = -32 - 15 - 13 4х + 8х = 12 + 24 - 6 -15х = -60 12х = 30 х = -60 : (-15) х = 30 : 12 х = 4 х = 2,5