How many solutions does the following system have? 7x+5y=4; -21x-15y=-12 a)infinitely many solutions b)one solution c)two solutions d)no solutions - Qammunity

How many solutions does the following system have? 7x+5y=4; -21x-15y=-12 a)infinitely many solutions b)one solution c)two solutions d)no solutions

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