Answer:
(18x + 6)m
(Anyone can correct me if I'm wrong)
Explanation:
Perimeter = 2l + 2w
Perimeter = 2(7x - 3) + 2(2(x + 3))
Perimeter = 14x - 6 + 4(x+3)
Perimeter = 14x -6 +4x +12
Perimeter = (18x + 6)m
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