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Published byFrancine Lawrence Modified over 8 years ago

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To solve an equation is to isolate the variable.

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To isolate the variable means to get it alone on one side of the equation.

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Given the equation, how do we isolate the x?

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What number has to move to leave x alone on one side of the equation?

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If we could move the seven,

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If we could the x would be isolated. move the seven,

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The next question is, how can we move the 7?

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What is the seven doing in the equation?

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What operation undoes division?

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To move the 7, we just need to multiply both sides of the equation by 7.

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to one side of an equation when you do something Remember...

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you have to do exactly the same thing to the other side.

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When we simplify,

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we will have our solution.

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To solve equations that involve multiplication you divide,

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To solve equations that involve multiplication you divide,

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and to solve equations that involve division you multiply.

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and to solve equations that involve division you multiply.

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Try these: 1. 2. 3.

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