20 •a – 432 = 568x + 579 = 309-3x – 465 = 76.5​

Question

20 •a – 432 = 568x + 579 = 309-3x – 465 = 76.5​

Answer 1

Ответ :20*а-432=568

20а=568+432

20а=1000

а=1000:20

а=50

х+579=309-3

х+579=306

х=306-579

х=-273