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For all of these simple examples, the variables x and y are not scaled (or multiplied) by any value. Let us broaden our study by solving equations that do have scalars (multipliers). We may show them in the forms: y = ax + b and x = cy + d, and use decimal numbers for a, b, c, and d.

Substitution

Elementary Algebra


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Visual Math Learning is a free educational web site featuring an interactive on-line tutorial for teaching elementary mathematics and basic arithmetic for grades K-12 at the pre-algebra level. It is an instructional aid for parents, teachers, and educators of primary, elementary, and middle school students, as well as a resource for lesson plans, homework help, and home schooling math lessons. The tutorial includes games, puzzles, interactive diagrams, and computer animated virtual manipulatives that emphasize active learning concepts by visualization.