Question

упростите выражение 2(5+x) -3x, -4(3-a)-a, 6(5-c)+7, 4(2n+3m)-6m_8n, -(-10n+12)-14, 7(-y+2)-(my), 18-(3a+10)​

Answer 1

Ответ:

2(5+x) = 10+2x

-4(3-a)=-12+4a

6(5-c) +7 = 30-6c+7=37-6c

4(2n+3m)-6m-8n= 8n+12m-6m-8n= 6m

-(-10n+12)-14= 10n-12-14= 10n-26

7(-y+2)-(my)= -7y+14-my

18-(3a+10)=-54a+180