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Q: When you to be use problem solving method?

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The elimination method and the substitutionmethod.

Solving by the elimination method gives: x = 3 and y = 2

A pro for solving equations through graphing can allow one to visualize problems which can allow one to make better sense to the problem. However, fractions, and decimals can be very difficult to plot accurately. Furthermore, solutions could fall outside of the boundaries of a graph making them impossible to see with a graph. A pro for solving equations through either the methods of substitution and elimination allow one to achieve an exact answer regardless of fraction, decimal, or integer. However, by using these methods one will have a more difficult time with visualization without the use of a graph.

Solving these simultaneous equations by the elimination method:- x = 1/8 and y = 23/12

The elimination method only works with simultaneous equations, hence another equation is needed here for it to be solvable.

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