An open number sentence is a sentence which contains a variable. A variable is a unknown number but replaced with a letter and can be on either side of an equals sign.
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a solution
As a number sentence it is: X - 9
no it is not it has to be like this for it to be a number sentence......... 5x5=25........P.S..25 is the answer
An Equation is a number sentence stating that two amounts are equal
It's a number sentence