Question

Упростите

23 * (6,9 c - 1 12 d) - 4,8 * (5,8 c - 2,5 d)

Спасибо заранее

Answer 1

1) 2/3 • ( 6,9с - 1 1/2d ) = 2/3 • ( 69/10c - 3/2d ) = 69/15c - d = 4,6c - d
2) 4,8 • ( 5,8c - 2,5d ) = 27,84c - 12d
3) 4,6c - d - 27,84c + 12d = - 23,24c + 11d
Ответ - 23,24с + 11d