The number of fish in a lake triples every 5 years. is It linear or exponential

Asequence is defined recursively by the formula  f(n  +  1)  =  f(n)  +  3 . the first term of the sequence is  –4. what is the next term in the sequence? –7–117

Three times the sum of a number and seven is negative thirty-six. what is the number?

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