# data[].attributes.body
if you subtract the same number from each side of an equation, the two sides remain equal

# data[].attributes.body
to replace a variable with a value that results in a true sentence

# data[].attributes.body
the value of a variable that makes an equation true; the solution of 12=x+7 is

# data[].attributes.body
if you multiply each side of an equation by the same nonzero number, the two sides remain equal

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operations which undo each other; for example, addition and subtraction are inverse operations

# data[].attributes.body
a mathematical sentence showing two expressions are equal; an equation contains an equals sign

# data[].attributes.body
a symbol of equality, =

# data[].attributes.body
if you divide each side of an equation by the same nonzero number, the two sides remain equal

# data[].attributes.body
if you add the same number to each side of an equation, the two sides remain equal