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if moira sold 51 tickets and they sold 72 tickets in all to find out how many tickets merry sold we can make an equation with a variable :51 ( the number or tickets moira sold)+ x ( the unknown number of tickets kerry sold ) = 72 ( the total number of tickets sold) any variable , from a to z can be used to represent kerry’s tickets here it doesn’t have to be x

what could be written as an equation with one variable