who this question all three parts
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(i) 3(n+6) = (3×5) + (3×6) -------->==
3n + 18 = 15+ 18
3n = 15+18-18
3n = 15
n = 15/3
n=5
3n + 18 = 15+ 18
3n = 15+18-18
3n = 15
n = 15/3
n=5
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