Ответ:
18. 3
7a1 +42d=140
a7=140/7=20
19. 1
60x=42y
y/x=7/10
20. 2
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Ответ:
18. 3
7a1 +42d=140
a7=140/7=20
19. 1
60x=42y
y/x=7/10
20. 2