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Example33 - Now substitute z = 3 into equation(4 to find y...

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Example 1 Solve this system of equations using elimination. All the equations are already in the required form. Choose a variable to eliminate, say  x , and select two equations with which to eliminate it, say  equations (1) and (2).  Select a different set of two equations, say equations (2) and (3), and eliminate the same variable. Solve the system created by equations (4) and (5).
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Unformatted text preview: Now, substitute z = 3 into equation (4) to find y . Use the answers from Step 4 and substitute into any equation involving the remaining variable. Using equation (2), Check the solution in all three original equations. The solution is x = –1, y = 2, z = 3....
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