Can someone help, I am so confused??

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.

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?