Решите линейные уравнения 2х+3=0; -4х+3=-2; 6+5х=2х+9; -4(3-х)=2х+7; 7+3(2х+1)=4

Question

Решите линейные уравнения 2х+3=0; -4х+3=-2; 6+5х=2х+9; -4(3-х)=2х+7; 7+3(2х+1)=4

Answer 1

2х + 3 = 0
2х = 3
х = 3/2
х = 1,5

-4х + 3 = -2
-4х = -2 - 3
-4х = -5
4х = 5
х = 5/4
х = 1 1/4

6 + 5х = 2х + 9
5х - 2х = 9 - 6
3х = 3
х = 1

-4(3 - х) = 2х + 7
-12 + 4х = 2х + 7
4х - 2х = 7 + 12
2х = 19
х = 19/2
х = 9 1/2

7 + 3(2х + 1) = 4
7 + 6х + 3 = 4
10 + 6х = 4
6х = -6
х = -1