The formula to convert celsius to fahrenheit is f=9/5c+32. convert 87° f to celsius .round to the nearest degree

31°C

Step-by-step explanation:

The formula to convert Celsius to Fahrenheit is F=9/5c+32.

To convert  87° F to Celsius plug in F = 87 in the above formula, we get

87 =

Now we have to isolate the variable and the constant.

Subtract 32 from both sides, we get

87 - 32 =

55 =

Multiply both sides by the reciprocal of -9/5

Which is called inverse operations to find the value of C.

The reciprocal of -9/5 is -5/9

C = 275/9

C = 30.5°

To round off to the nearest degree, we get

31°C

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