1)
1. 4a+5a=
2. 13a-2a=
3 . -3a+4a=
4 .-7a-6a=
5 .3a-a
6. a+8a=
2)
1. 4b+5+3b-3b-3=
2.b-4+5b-7=
3.-7b-7+(b+7)=
4.(2b-4)-(3b-9)=
5.7b+3(b-1)=
6.4b-2(b+3)=
1)
1. 4a+5a=
2. 13a-2a=
3 . -3a+4a=
4 .-7a-6a=
5 .3a-a
6. a+8a=
2)
1. 4b+5+3b-3b-3=
2.b-4+5b-7=
3.-7b-7+(b+7)=
4.(2b-4)-(3b-9)=
5.7b+3(b-1)=
6.4b-2(b+3)=
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Answers & Comments
1)
1.4a+5a= 9а
2. 13a-2a=11а
3 . -3a+4a=1а
4 .-7a-6a=-13а
5 .3a-a=2а
6.a+8a=9а
2)
1. 4b+5+3b-3b-3=4b+2
2.b-4+5b-7=6b-11
3.-7b-7+(b+7)=
4.(2b-4)-(3b-9)=
5.7b+3(b-1)=
6.4b-2(b+3)=