Example23 - change either equation. Simply add or subtract....

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Example 2 Solve for  x  and  y.   First multiply the bottom equation by 3. Now the  y  is preceded by a 3 in each equation.  The equations can be subtracted, eliminating the  y  terms.  Insert  x  = 5 in one of the original equations to solve for  y Answer:   x  = 5,  y  = 3  Of course, if the number in front of a letter is already the same in each equation, you do not have to 
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Unformatted text preview: change either equation. Simply add or subtract. To check the solution, replace each x in each equation with 5 and replace each y in each equation with 3....
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This note was uploaded on 11/09/2011 for the course MATH 1310 taught by Professor Staff during the Fall '07 term at Texas State.

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Example23 - change either equation. Simply add or subtract....

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