Question

find the sum of xy-yz+z. 2yz+xy-7 and 3xy +3yz+3
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Answer 1

Answer:

$xy - yz + z + 2yz + xy - 7 + 3xy + 3yz + 3 \\ xy + xy + 3xy - yz + 2yz + 3yz \: + z - 7 \\ 5xy + 4yz + z - 7 \: \: \: answer$