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OpenStudy (anonymous):
use substitution to solve each system of linear equations. y=x+18 y=3x i have been stuck on this problem for about an hour.
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OpenStudy (anonymous):
then just put 3x instead of where y is on the equation, so then it is 3x = x +18 and now simplify
OpenStudy (anonymous):
since u move x to the other side to feet with the other x's, it becomes negative, and so it is now 3x - x = 18
OpenStudy (anonymous):
then it becomes 2x = 18
OpenStudy (anonymous):
which makes x= 9
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