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Answer:
86° F.
Step-by-step explanation:
Use the formula C = 5/9(F - 32) to convert 30C to Fahrenheit. Plug 30 into C:
30 = 5/9(F - 32)
Multiply both sides by 9/5 (dividing by 5/9):
30 · 9/5 = 5/9(F - 32) · 9/5
54 = F - 32
Add 32 to both sides:
54 + 32 = F - 32 + 32
F = 86°.
Therefore, 30C = 86° F.
