{
"query": {
"display": "A sofa is 12 years old and a table is 36 years old. In how many years will the table be twice as old as the sofa?",
"symbolab_question": "#A sofa is 12 years old and a table is 36 years old. In how many years will the table be twice as old as the sofa?"
},
"solution": {
"level": "PERFORMED",
"subject": "Word Problems",
"topic": "Age",
"subTopic": "Other",
"default": "\\mathrm{Number\\:of\\:\\mathrm{years\\:from\\:now}}:\\:12"
},
"steps": {
"type": "interim",
"title": "A sofa is 12 years old.<br/>a table is 36 years old.<br/>In how many years will the table be twice as old as the sofa?<br/> <br/>Number of \\mathrm{years from now}$$:\\:12$$",
"steps": [
{
"type": "interim",
"title": "Translate the problem into an equation:$${\\quad}2\\left(12+x\\right)=36+x$$",
"steps": [
{
"type": "step",
"primary": "Represent in terms of $$x:$$",
"result": "\\mathrm{Number\\:of\\:years}\\::\\:x<br/>\\mathrm{Sofa}\\::\\:12<br/>\\mathrm{Table}\\::\\:36"
},
{
"type": "step",
"primary": "Ages $$x\\:$$years from now",
"result": "\\mathrm{Sofa}\\::\\:12+x<br/>\\mathrm{Table}\\::\\:36+x"
},
{
"type": "step",
"primary": "Write an equation for $$x\\:$$years from now",
"result": "2\\left(12+x\\right)=36+x"
}
]
},
{
"type": "interim",
"title": "Solve for $$x,\\:2\\left(12+x\\right)=36+x:{\\quad}x=12$$",
"input": "2\\left(12+x\\right)=36+x",
"steps": [
{
"type": "interim",
"title": "Expand $$2\\left(12+x\\right):{\\quad}24+2x$$",
"input": "2\\left(12+x\\right)",
"steps": [
{
"type": "step",
"primary": "Apply the distributive law: $$a\\left(b+c\\right)=ab+ac$$",
"secondary": [
"$$a=2,\\:b=12,\\:c=x$$"
],
"result": "=2\\cdot\\:12+2x",
"meta": {
"practiceLink": "/practice/expansion-practice",
"practiceTopic": "Expand Rules"
}
},
{
"type": "step",
"primary": "Multiply the numbers: $$2\\cdot\\:12=24$$",
"result": "=24+2x"
}
],
"meta": {
"solvingClass": "Solver",
"gptData": "pG0PljGlka7rWtIVHz2xymbOTBTIQkBEGSNjyYYsjjDErT97kX84sZPuiUzCW6s7gNDAJR9X54SyY8dXYNCrH3cUJadsLvGcDY7IUPYXjf6zs903yhxK0NInTwR7JvSRyM/29l7SHlwNleTQoRn0qBJyf8zawtgEaDEKWrMLEzZO5mLkZYFApJvvKCHfgbrm"
}
},
{
"type": "step",
"result": "24+2x=36+x"
},
{
"type": "interim",
"title": "Move $$24\\:$$to the right side",
"input": "24+2x=36+x",
"result": "2x=x+12",
"steps": [
{
"type": "step",
"primary": "Subtract $$24$$ from both sides",
"result": "24+2x-24=36+x-24"
},
{
"type": "step",
"primary": "Simplify",
"result": "2x=x+12"
}
],
"meta": {
"gptData": "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"
}
},
{
"type": "interim",
"title": "Move $$x\\:$$to the left side",
"input": "2x=x+12",
"result": "x=12",
"steps": [
{
"type": "step",
"primary": "Subtract $$x$$ from both sides",
"result": "2x-x=x+12-x"
},
{
"type": "step",
"primary": "Simplify",
"result": "x=12"
}
],
"meta": {
"gptData": "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"
}
}
],
"meta": {
"solvingClass": "Equations"
}
},
{
"type": "step",
"result": "\\mathrm{Number\\:of\\:\\mathrm{years\\:from\\:now}}:\\:12"
}
]
}
}
Solution
A sofa is 12 years old and a table is 36 years old. In how many years will the table be twice as old as the sofa?
Solution
Solution steps
Translate the problem into an equation:
Solve for
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