Solve the system by the substitution method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(-4, 0)}
B. no solution; ?
C. {(0, -4)}
D. infinitely many solutions; {
2x + 6y = 0} or {
-2x - 6y = -4}
Answer: B
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