Algebra 1HardSystems of Equations ShareSystems of Equations · Hard problemHow many solutions does this system have?{−x−5y=7−4x−20y=28\begin{cases} - x - 5 y = 7 \\ - 4 x - 20 y = 28 \end{cases}{−x−5y=7−4x−20y=28Aexactly one solutionBinfinitely many solutionsCno solutionCheck Show answer Walk through it step by step Practice more like this Review this concept