Answer:
r = 2
Explanation:
15 = 2r + 8 + 3
15 = 2r + 11
4 = 2r
r=2
15 = 2(r + 4) + 3
Distribute
15 = 2r+8+3
Combine like terms
15=2r+11
Subtract 11 from each side
15-11 = 2r+11-11
Divide by 2
4/2 =2r/2
2=r
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