A Review of Algebra

by Romeyn Henry Rivenburg

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SIMULTANEOUS EQUATIONS

Note. Up to this point each topic presented has reviewed to some extent the preceding topics. For example, factoring reviews the special rules of multiplication and division; H. C. F. and L. C. M. review factoring; addition and subtraction of fractions and fractional equations review H. C. F. and L. C. M., etc. From this point on, however, the interdependence is not so marked, and miscellaneous examples illustrating the work already covered will be given very frequently in order to keep the whole subject fresh in mind.

1. Solve by three methods—addition and subtraction, substitution, and comparison:

Solve and check:

2.

3.