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Grade 7 Math · Problem type
Equivalent expressions
Use this for “Which expressions are equal to 2x + 6?”
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Which expression is it equal to?
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Assumptions
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Multiply out brackets: 3(x + 2) = 3x + 6, every term inside times 3.
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Combine like terms: 3x − x = 2x; numbers join numbers.
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Equivalent expressions give the same value for every x: try x = 1 to check.
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