Linear programming subject to the following constraints

What does x = in this equation x+3+2x=x+5

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)