Answer:
see explanation
Explanation:
Distribute parenthesis by - 7 and collect like terms
= 3x - 2z - 21x + 14z
= - 18x + 12z ← factor out 6 from each term
= 6(- 3x + 2z)
6(2z-3x)
3x−2z−7(3x−2z)
=3x-2z-21x+14z
=12z-18x
=6(2z-3x)
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