Помогите сделать два задания :
1) Упростите выражение :
а) 1,2х+2,7х+х+0,1х
б)15,2с+1,6х+2,9х-с
в) 7,4а+2,6+а,5,8
2) Вычисли : 37,2:(1,6-1,352)- 30,8 * (1,25+2,8)
Помогите плиз
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