Question #189229

6n + 4 = 16, find the value of 5n - 7


1
Expert's answer
2021-05-07T11:56:30-0400

Solution:Given that:6n+4=16                                         6n=164                                         6n=12                                           n=126                                           n=2                   5n7=5(2)7                                   =107                                   =3                    5n7=3Solution: Given ~that :6n+4=16 \\ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~6n=16-4 \\~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~6n=12 \\~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~n=\frac{12}{6} \\~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~n=2 \\~~~~~~~~~~~~~~~~~~~\therefore5n-7=5(2)-7 \\~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~=10-7 \\~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~=3 \\~~~~~~~~~~~~~~~~~~~~\therefore 5n-7=3


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