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Simplify the expressions below. The first one is done for you. 

2ab + 5a + 5ab  2 7ab + 5a  2 
7nm  3nm + 4bc + bc + 3 4nm + 5bc + 3 
7e + 2e + 4ef + 2g + ef + 4 9e + 5ef + 2g + 4 
6 + 3ac + 6cb + 4 + 2cb + 9ac 12ac + 8cb + 10 
7a + 2b + 5a + 9b + 3a 15a + 11b 
7pq + 7pq  2nm  7 + 5nm  pq 13pq + 3nm  7 
a + b + c + 2a +2ab + 3c + b + 5ab 3a + 2b + 4c + 7ab 
7k + 9k + 17c  10k  8c  2k 4k + 9c 
6xy  x  y + 3xy  5x  3y  8 9xy  6x  4y  8 
3r + s + 3r  6r + 9t + 4s + 8r + 15t 8r + 5s + 24t 
11rs + 11st +12s + 15st + 4rs  3 15rs + 26st + 12s  3 
17xy + 9xy + 8yz  15xy  2yz 11xy + 6yz 
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The various resources listed below are aligned to the same standard, (6EE04) taken from the CCSM (Common Core Standards For Mathematics) as the Expressions and equations Worksheet shown above.
Identify when two expressions are equivalent (i.e., when the two expressions name the same number regardless of which value is substituted into them). For example, the expressions y + y + y and 3y are equivalent because they name the same number regardless of which number y stands for. Reason about and solve onevariable equations and inequalities.
Similar to the above listing, the resources below are aligned to related standards in the Common Core For Mathematics that together support the following learning outcome:
Apply and extend previous understandings of arithmetic to algebraic expressions