Решите уравнения 6x-3 (x+4)=23-2x 4x+3 (x-3)=40

6х - 3 * (х + 4) = 23 - 2х
6х - 3х - 12 = 23 - 2х
3х + 2х = 23 + 12
5х = 35
х = 35 : 5
х = 7


4х + 3 * (х - 3) = 40
4х + 3х - 9 = 40
7х = 40 + 9
7х = 49
х = 49 : 7
х = 7

▪6x-3 (x+4)=23-2x
6х-3х-12+2х=23
5х=23+12
5х=35
х=35÷5
х=7

Проверка:
6×7-3 (7+4)=23-2×7
42-3×11=23-14
42-33=9
9=9

▪4x+3 (x-3)=40
4х+3х-9=40
7х=40+9
7х=49
х=49÷7
х=7

Проверка:
4×7+3 (7-3)=40
28+3×4=40
28+12=40
40=40