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romaboldar1
@romaboldar1
June 2022
2
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1. Упростите выражение:
а) -3a + 7a – 10a
б) 3x – 5 – 2x + 7
2. Раскройте скобки:
a) b + (-7m + 2n)
б) -3p – (-5x +2y)
в) – (a – 4b) + (-8x + 3y)
г) (a – 9) – (13 – a) + (11 – a)
3. Вычислите:
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Answers & Comments
maxim170
№1.
а) - 3а + 7а - 10а = 4а - 10а =
- 6а
б) 3х - 5 - 2х + 7 = 3х - х - 5 + 7 =
х + 2
№2.
а) b + (- 7m + 2n) =
b - 7m + 2n
б) - 3p - (- 5x + 2y) =
- 3p + 5x - 2y
в) - (a - 4b) + (- 8x + 3y) =
- a + 4b - 8x + 3y
г) (a - 9) - (13 - a) + (11 - a) = a - 9 -13 + a + 11 - a =
a -11
6 votes
Thanks 3
Inf777
Verified answer
1а)-6a
б)x+2
2a)b-7m+2n
б)-3p+5x+2y
в)-a+4b-8x+3y
г)a-9-13+a+11-a
8 votes
Thanks 14
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Answers & Comments
а) - 3а + 7а - 10а = 4а - 10а = - 6а
б) 3х - 5 - 2х + 7 = 3х - х - 5 + 7 = х + 2
№2.
а) b + (- 7m + 2n) = b - 7m + 2n
б) - 3p - (- 5x + 2y) = - 3p + 5x - 2y
в) - (a - 4b) + (- 8x + 3y) = - a + 4b - 8x + 3y
г) (a - 9) - (13 - a) + (11 - a) = a - 9 -13 + a + 11 - a = a -11
Verified answer
1а)-6aб)x+2
2a)b-7m+2n
б)-3p+5x+2y
в)-a+4b-8x+3y
г)a-9-13+a+11-a