Question

1)23a-7b-4a+10b
2)6,5a+5,3b-9b-6,5a
3)ab-2ab-3b+ab+5b
4)8xy+9x-9xy-7x
5)17,8x+9y-5,5x-10y

Answer 1

1)23a-7b-4a+10b= 19a + 3b

2)6,5a+5,3b-9b-6,5a = 3,7b

3)ab-2ab-3b+ab+5b =2b

4)8xy+9x-9xy-7x= 2x - xy = x(2-y)

5)17,8x+9y-5,5x-10y = 12,3x - y