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morpeh [17]
4 years ago
7

PLZ PLZ Help me! I don't know how to do this. Can someone please help me.

Mathematics
2 answers:
Assoli18 [71]4 years ago
6 0
7)
4n + 5 + 8n - 5 = 180
12n = 180
    n = 15

answer
Last one
n = 15
8)
8.5x + 2 = 9x - 6
-0.5x = -8
      x = 16
answer
B. x = 16

9)

4z + 3z + 6 = 90
7z = 84
  z = 12

answer
A. z = 12

garik1379 [7]4 years ago
3 0
N in this problem is equal to 15.
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