Question

Срочно!
6с-(9-10с)-9=
18+(4с-12)+2с=
​

Answer 1

Пошаговое объяснение:

$6c - (9 - 10c) - 9 = 6c - 9 + 10c - 9 = 16c - 18$

$18 + (4c - 12) + 2c = 18 + 4c - 12 + 2c = 6 + 6c$