Question

решить уровнения только 2,4,6​

Answer 1

7 - 3х = х + 1

7-1 = 3х + х

6 = 4х

х= 6/4

х= 1,5

4(5-х) = 3х -1

20 - 4х = 3х -1

20 + 1 = 3х +4х

21 = 7х

х=21:7

х= 3

5(х-1) = 4х + 3

5х - 5 = 4х + 3

5х - 4х = 5+ 3

х = 8