(18 + 5x) * 3 = 309
54 + 15x = 309
15х = 309 - 54
15х = 255
х = 17
Copyright © 2025 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
(18 + 5x) * 3 = 309
54 + 15x = 309
15х = 309 - 54
15х = 255
х = 17