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Katlyn99
Using substitution to solve the system x = 2y + 3 and 4x - 5y = 9, which of the following could be the first step? x - 2y = 3 4x - 5y = 9 4(2y + 3) - 5y = 9 x + 2y = 4x - 5y 5x - 3y = 12 - 3x + 7y = -6
ok... you are told x = 2y + 3 you need to substitute this into the equation 4x - 5y = 9 so replace x with 2y + 3 you would have 4(2y + 3) - 5y = 9