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Published byMervin Shaw Modified over 5 years ago

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to one side of an equation, When you do something

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

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To solve an equation means to find every number that makes the equation true.

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In the equation, x is the number to get 15. you add to 7

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What is the number? 8, of course.

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What is the number? 8, of course.

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What is the number? 8, of course. So we would write the solution,.

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In some equations, the solution is obvious.

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But in other equations, the solution is not so obvious.

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Many times we need a way to solve equations.

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To understand one way, we can work backwards. Start with a solution,

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And create another equation by changing both sides.

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To solve that equation, you can just undo what you did.

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Now you see how easy solving these types of equations can be.

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If you had started with the solution, what would you have done to get this equation?

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And if you subtracted 12 from both sides, what would you do to get the original solution?

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Right! add 12 to both sides. You would need to

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think about what you need to do to get the variable by itself on one side of the equation. As you solve these equations,

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Think about what you need to do isolate the variable.

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5. 6. 7.

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