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OpenStudy (anonymous):
Solve the following system of equations by the substitution method. 10x + 10y = 1 x = y - 3
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OpenStudy (anonymous):
Take a look here: http://www.teacherschoice.com.au/Maths_Library/Algebra/Alg_9.htm Simply put, isolate one variable in one of the equations, then plug it into the other.
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