1.11а+8b-9ab
2.5a^2b-5ab^2-2
3.=5(3x-2-7b+x-b) =5(4x-2-8b)=10(2x-1-4b)
4.=8a-(25-15a)=8a-25+15a=23a-25
5.-(3x-34)
6.-11+0,5a
1.11а+8b-9ab
2.5a^2b-5ab^2-2
3.=5(3x-2-7b+x-b) =5(4x-2-8b)=10(2x-1-4b)
4.=8a-(25-15a)=8a-25+15a=23a-25
5.-(3x-34)
6.-11+0,5a