Розкрити дужки і спростити вираз:
1) 3(7 - b) - 7(b + 8,1)
2) -4(2m - 9) - 3(6m + 8)
3) -(9,2 - a) + (-6,8 + a)
1) 3(7 - b) - 7(b + 8,1)
2) -4(2m - 9) - 3(6m + 8)
3) -(9,2 - a) + (-6,8 + a)
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Answers & Comments
:3(7 - b) - 7(b + 8.1) = 21 - 3b - 7b - 57.7
= -10b - 36.7
-4(2m - 9) - 3(6m + 8) = -8m + 36 - 18m - 24
= -26m + 12
-(9.2 - a) + (-6.8 + a) = -9.2 + a - 6.8 + a
= 2a - 16
Пошаговое объяснение:
3(7 - в) - 7(в + 8,1) = 21 - 3в - 7в - 56,7 = -10в - 35,7
-4(2m - 9) - 3(6m + 8) = -8m + 36 - 18m - 24 = -26m + 12
-(9,2 - a) + (-6,8 + a) = -9,2 + a - 6,8 + a = 2a - 16