# data[].attributes.body
an equation that states a rule for the relationship between certain quantities

# data[].attributes.headline
the process of finding all values of the variables that make the equation a true statement  

# data[].attributes.subject
the process of finding all values of the variables that make the equation a true statement  

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equations that have the same solution

# data[].attributes.body
equations with more than one operation

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an equation that is true for every value of the variable

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a comparison of two numbers by division

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the ratio of two measurements having different units of measures

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an equation of the form a/b = c/d where b,d not equal to 0 that two ratios are equivalent

# data[].attributes.body
a ratio of two quantities , the second of witch is one unit

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A model used to represent an object that is too large or too small to be built at actual size

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A literal equation is an equation where variables represent known values

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is a problem-solving method that uses the fact that any number or expression can be multiplied by one without changing its value

# data[].attributes.body
an average resulting from the multiplication of each component by a factor reflecting its importance