a) 2a+6+3a+⅔=5a+6⅔
b) 3b+b-4=4b-4
c) 2z + z +3z=6z
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a) 2a+6+3a+⅔=5a+6⅔
b) 3b+b-4=4b-4
c) 2z + z +3z=6z