12. Find the perimeter of a triangle with sides 3z – 2x - y, 4x + y – 2z and x + y + z.
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ᴀ᭄ɴsᴡᴇʀ
Perimeter of a triangle
=sum of its sides
=(2y+3z+z−y+4y−2z)
=(5y+2z)
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