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Mathematics 7 Online
OpenStudy (anonymous):

why isn't "(x + x/1.5)t = 180" a valid expression?

OpenStudy (lgbasallote):

usually depends on your criteria

OpenStudy (anonymous):

because there are 2 variables and only one equation.

OpenStudy (anonymous):

btw that's an equation, not an expression (an equation has an equal sign)

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