СРОЧНО, ДАЮ 20 БАЛОВ!
Упростите выражение:
1) 0,3(1,2x - 0,5у) - 1,5(0,4x + y)
2)-2,4(2,5а - 1,5b) + 0,5(1,8b + 5,6а)
3)-1,8(3,5m - 5) - 6,5(0,8 - 0,4m)
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