Умоляю помогите
Раскройте скобки и упростите выражение:
№1.
а) 2x – (2x + y) + y...
![subject](/tpl/images/cats/mat.png)
Mathematics, 10.04.2020 11:47 MayFlowers
Умоляю помогите
Раскройте скобки и упростите выражение:
№1.
а) 2x – (2x + y) + y =
б) – a + (2a – b) + 2b =
в) 7 – (b + 14) – 2b =
г) 3b – (18 + b) + 8 =
№2.
а) 2(3 – x) – (8 + x) =
б) – 4(y + 5) + (12 – y) =
в) – (7 – x) + 4(x – 5) =
г) – 9(y – 4) – (12 + y) =
№3. Решите уравнение:
а) 3x – 5x = -−13 +3
б) – 5y –17y = -−50 +6
в) a –12a = -−6 − 27
г) –27x –33x = –12 ∙ (−-5)
№4. Раскройте скобки и упростите выражения:
–12(7 −2d) –9(7d –5) –3(15 +8d) =
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