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6-71.

Solve the system of equations below and then check your solution in each equation. Be sure to keep your work well organized. Homework Help ✎

Choose a variable to eliminate and two equations to work with.
There are many possibilities.
We will use the first and third equations and eliminate in the example.
Multiply the third equation by then add it to the first.

Choose a different pair of equations and eliminate the same variable.
Here, we use the second and third equations.
Multiply the third equation by then add it to the second.

Now combine the two result equations.

Solve for and substitute to find the other values.

Check your result in each equation.