Answer: They sold 68 tickets at the door
688-920= -2x= -232
2x=232/2=116
184-116=68
The correct answer is the first choice
An inverse operations is the reverse of the equation. For example, since it's 102 ÷ 3 = 34, to get the inverse you would take the opposite sign of "÷" and make it "×," while changing the equal sign to make the statement true. The inverse operation used to verify this is 102 = 3 × 34
