Answer:
0
Step-by-step explanation
r = 8
Explanation:
6 - 4r + 4r = 7 - Solve
6 - 8r = 7 - Add the 4rs togther
1 = 8r - subtract 6 from 7
8 = r = divide 8 on both sides
r = 8 - your final answer
Hopefully this helps.
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