ПОМОГИТЕ ПЛИЗ ДАЮ 25 БАЛЛОВ!!!!!!!!!!
2. Раскрыть скобки и упростить
( х + 7,8) – ( 8,1 + х)
- (6.3 – у) – ( 9,1 + у0
- (7,2 – а + к) + ( 5,3 + к)
( в – с – 4,8) – ( - с – в – 4,8).
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