When adding or subtracting two decimals, what is the first thing you must do

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.

James is playing his favorite game at the arcade. after playing the game 3 times, he has 8 tokens remaining. he initially had 20 tokens, and the game costs the same number of tokens each time. the number t of tokens james has is a function of g, the number of games he plays. write the function’s formula? t=

The product of 3 and a number increased by 8 is 31