Cesimendoza Cesimendoza

24-08-2017
Mathematics

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Brianna solved an equation by adding 7 to both side of an equation. Then she checked that 21 was the correct solution by substituting it back into the original equation. What two properties did she use to solve this equation

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michellegopman michellegopman

24-08-2017

sorry can't help you with that...wish I could

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