Answer:
r = 22
Explanation:
Given
r + 4 = r -
Multiply through by 4 to clear the fractions
2r + 16 = 3r - 6 ( subtract 2r from both sides )
16 = r - 6 ( add 6 to both sides )
22 = r
r=22
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r + 4 = 
r - 