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Published byWarren Bryant Modified over 9 years ago

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Intro to Algebra/Geometry Solving Equations by Adding or Subtracting

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Equations Equations use an = sign to show that two expressions are equal (balanced). 2 + 1 = 31+1 = 2 2 + x = 4

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Variables A variable is a letter that represents a number. We can find what that number is. The solution of the equation is the value that can be substituted in for the variable to make an equation true.

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Find the solution 1.2 + x = 4 2.3 - x = 1

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Inverse Operation Plus Multiply Minus Divide Minus Divide Plus Multiply

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Use Inverse Operations to Solve 1.x - 7 = 10 2.5 + x = 25 3.24 + x = 58

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Remember KEEP EQUATIONS BALANCED WHATEVER YOU DO TO ONE SIDE OF THE EQUATION YOU HAVE TO DO TO THE OTHER SIDE

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Use Inverse Operations to Solve 1.x - 7 = 10 2.5 + x = 25 3.24 + x = 58

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