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OpenStudy (anonymous):
Using substitution to solve the system x = 2y + 3 and 4x - 5y = 9, which of the following could be the first step? A. x - 2y = 3 4x - 5y = 9 B. 4(2y + 3) - 5y = 9 C. x + 2y = 4x - 5y D. 5x - 3y = 12 E. - 3x + 7y = -6
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hero (hero):
B
OpenStudy (eyust707):
agreed
OpenStudy (eyust707):
you see if x =2y +3 that means we can change x and make it (2y +3)
OpenStudy (eyust707):
this make it nice because then we only have one variable.
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