4(2n + 3) =44 pls someone help me with this??

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula c= r/1.8 - 273, what is the temperature in celcius corresponding to r degrees rankine.

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

With finding limits of multi variable !