Помогите с решением 1. -3* (y-5) -2* (y-4 )= 2. 5m- (3m+5) + (2m-4) = 3. 4m (-2a-3b+5c)...

Question

Помогите с решением
1. -3* (y-5) -2* (y-4 )=
2. 5m- (3m+5) + (2m-4) =
3. 4m (-2a-3b+5c) =
4. 23,6+ (4,5-30,1) - (6,8+8)=

Answer 1

1) -3•(у-5)-2•(у-4)=-3у+15-2у+8=-5у+23;
2) 5m-(3m+5)+(2m-4)= 5m-3m-5+2m-4=4m-9;
3) 4m(-2a-3b+5c)=-4m•2a-4m•3b+4m•5c= -8am-12bm+20cm;
4) 23.6+(4.5-30.1)-(6.8+8)= 23.6+(-25.6)-14.8=23.6-25.6-14.8= -16.8;


удачи :)

Answer 2

1. -3y+15-2y+8= -5y+23
2. 5m-(3m+5)+(2m-4)=5m-3m-5+2m-4=4m-9
3. 4m(-2a-3b+5c)=-8am-12mb+20c
4. 23.6+(4.5-30.1)-(6.8+8)=23.6-25.6-14.8=-2-14.8=-16.8