Question 822205
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see this answer for the solution method:
http://www.algebra.com/algebra/homework/Linear-equations/Linear-equations.faq.question.822233.html
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Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
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Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
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Solve systems of linear equations up to 6-equations 6-variables:
https://sooeet.com/math/system-of-linear-equations-solver.php