{
  "problem": "Solve for $k$ : $k + 10 = 20$",
  "hints": [
    "Subtract",
    "$10$",
    "from both sides:",
    "$ \\begin{eqnarray} \\\\ k + 10 &=& 20 \\\\ \\\\ {-10} && {-10} \\end{eqnarray} $",
    "$ \\begin{eqnarray} \\hphantom{10 + k} &\\hphantom{=}& \\hphantom{20} \\\\ k &=& 20 {- 10} \\\\ \\end{eqnarray} $",
    "Simplify. $ k = 10$"
  ]
}
{'source': 'AMPS', 'file': 'amps/khan/309/1608207589.json'}