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OpenStudy (pig_cat223):
plz help... solve this system of equations. seperate the x- and y-values with a comma. 20x+11y=37 4x+3y=13
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OpenStudy (theprofessor35):
First, use substitution.
OpenStudy (theprofessor35):
20x+11y=37 4x+3y=13
OpenStudy (theprofessor35):
20x+11y=37 11y = 37 - 20x
OpenStudy (theprofessor35):
11y = 37 - 20x y = 37/11 - 20/11x
OpenStudy (theprofessor35):
plug that into the other equation
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OpenStudy (theprofessor35):
4x+3y=13 y = 37/11 - 20/11x 4x + 3(37/11 - 20/11x) = 13
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