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Algebraic Substitutions

Given an algebraic statement with variables [a-z], this calculator takes a set of given substitution values, i.e., x=2,y=3,z=4, and evaluates your statement using the substitution values.

Simultaneous Equations

Solves a system of simultaneous equations with 2 unknowns using the following 3 methods:

1) Substitution Method (Direct Substitution)

2) Elimination Method

3) Cramers Method

1) Substitution Method (Direct Substitution)

2) Elimination Method

3) Cramers Method

Joel bought 88 books. Some books cost $13 each and some cost $17 each. In all, he spent $128. Which