Question

Решите уравнения.
7х + 2x = 27
16x - 4х = 60
7x - 5х = 70
4х + 12х = 20 + 12
х+ 123 = 562
621 - х = 235​

Answer 1

Пошаговое объяснение:

1)7x + 2x = 27

9x = 27

x = 3

2) 16x-4х=60

12x = 60

x = 5

3) 7x -5 x = 70

2x = 70

x = 35

4) 4x + 12х = 20 + 12

16x = 32

x = 2

5) x + 123 = 562

х=439

6) 621 - х=235

х=386