3. Раскройте скобки
1)1/2 * (x + 4/5) - (1/5 - x) =
2)- 2/3 * (6/7 - y) + (2/7 + y)
3)- (y + 1/8) + 3/4 * (2 + y) =
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1)1/2 * (x + 4/5) - (1/5 - x) =
2)- 2/3 * (6/7 - y) + (2/7 + y)
3)- (y + 1/8) + 3/4 * (2 + y) =
СРОЧНО 50 БАЛОВ
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Answers & Comments
Пошаговое объяснение:
1)
1/2 * (х + 4/5) - (1/5 - х) =
1/2х + 4/10 - 1/5 + х =
1/2х + 2/5 - 1/5 + х = 1 1/2х + 1/5
2)
-2/3 * (6/7 - у) + (2/7 + у) =
-12/21 + 2/3у + 2/7 + у =
-12/21 + 2/3у + 6/21 + у =
1 2/3у - 6/21 = 1 2/3у - 2/7
3)
- (у + 1/8) + 3/4(2 + у) =
-у - 1/8 + 6/4 + 3/4у =
-у - 1/8 + 12/8 + 3/4у =
-1/4у + 11/8 = -1/4у + 1 3/8