1.
1)5a+2a=7a
2)6b-4b=2b
3)2x+7x-5x=4x
4)3y-y-4y+8y=6y
5)4a-5b-2a-3b=2a ‐8
6)7x^2-6x5x^2+3x+3x=x18
7)6x+5-8y-3+5y-4x=2 3y 11x
8)5ab-4a+6b+8a-2b+3ab=8ab +4a
9)6a+7b-5c-4b+2a+c-5b-6a+2c= +14a -16b 7c
10)5m-9+3n-7m+4n+4-5y=+12m +7m 5y 13
11)8-7a-6ab-5b+10a +4ab-4a-11b-3= +17a +10ab 16b