15 баллов каждому. Срочно.
Раскрыть скобки и решить (до максимума)

1)-10(2x+3y)+50
2) 5(6y-3z)-2(5y+2z)
3) 3(4x-5y+2)-15
4)10-2(x-4)
5) 0,8(5y+4)+3,2
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