document.write( "Question 222991: Kimberly is twice as old as Ryan. In 4 years, she will be 7 years older than Ryan. How old is Kimberly now?
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Algebra.Com's Answer #166862 by drj(1380)\"\" \"About 
You can put this solution on YOUR website!
Kimberly is twice as old as Ryan. In 4 years, she will be 7 years older than Ryan. How old is Kimberly now?\r
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\n" ); document.write( "\n" ); document.write( "Step 1. Let x be the age of Ryan\r
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\n" ); document.write( "\n" ); document.write( "Step 2. Let 2x be the age of Kimberly\r
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\n" ); document.write( "\n" ); document.write( "Step 3. Let x+4 be the age of Ryan in 4 years\r
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\n" ); document.write( "\n" ); document.write( "Step 4. Let 2x+4 be the age of Kimberly in 4 years.\r
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\n" ); document.write( "\n" ); document.write( "Step 5. 2x+4=x+4+7 since Kimberly will be 7 years older than Ryan in four years.\r
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\n" ); document.write( "\n" ); document.write( "Step 6. Solving the equation in Step 5 yields the following steps\r
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Solved by pluggable solver: EXPLAIN simplification of an expression
Your Result:

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\n" ); document.write( " YOUR ANSWER\n" ); document.write( "


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  • This is an equation! Solutions: x=7.
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  • Graphical form: Equation \"2x%2B4=x%2B4%2B7\" was fully solved.
  • Text form: 2x+4=x+4+7 simplifies to 0=0
  • Cartoon (animation) form: \"simplify_cartoon%28+2x%2B4=x%2B4%2B7+%29\"
    For tutors: simplify_cartoon( 2x+4=x+4+7 )
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  • If you have a website, here's a link to this solution.
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DETAILED EXPLANATION

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Look at \"2%2Ax%2B4=x%2Bhighlight_red%28+4+%29%2Bhighlight_red%28+7+%29\".
Added fractions or integers together
It becomes \"2%2Ax%2B4=x%2Bhighlight_green%28+11+%29\".
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Look at \"2%2Ax%2B4=highlight_red%28+x%2B11+%29\".
Moved these terms to the left \"highlight_green%28+-x+%29\",\"highlight_green%28+-11+%29\"
It becomes \"2%2Ax%2B4-highlight_green%28+x+%29-highlight_green%28+11+%29=0\".
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Look at \"2%2Ax%2Bhighlight_red%28+4+%29-x-highlight_red%28+11+%29=0\".
Added fractions or integers together
It becomes \"2%2Ax%2Bhighlight_green%28+-7+%29-x=0\".
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Look at \"2%2Ax%2Bhighlight_red%28+-7+%29-x=0\".
Moved \"-7\" to the right of expression
It becomes \"2%2Ax-x%2Bhighlight_green%28+-7+%29=0\".
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Look at \"2%2Ax-x%2Bhighlight_red%28+-7+%29=0\".
Removed extra sign in front of \"-7\"
It becomes \"2%2Ax-x-highlight_green%28+7+%29=0\".
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Look at \"highlight_red%28+2%2Ax+%29-highlight_red%28+x+%29-7=0\".
Eliminated similar terms \"highlight_red%28+2%2Ax+%29\",\"highlight_red%28+-x+%29\" replacing them with \"highlight_green%28+%282-1%29%2Ax+%29\"
It becomes \"highlight_green%28+%282-1%29%2Ax+%29-7=0\".
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Look at \"highlight_red%28+%282-1%29+%29%2Ax-7=0\".
Remove extraneous '1' from product \"highlight_red%28+%282-1%29+%29\"
It becomes \"x-7=0\".
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Look at \"highlight_red%28+x-7+%29=0\".
Solved linear equation \"highlight_red%28+x-7=0+%29\" equivalent to x-7 =0
It becomes \"highlight_green%28+0+%29=0\".
Result: \"0=0\"
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Universal Simplifier and Solver

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Done!

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\n" ); document.write( "\n" ); document.write( "With \"x=7\" then \"2x=14\"\r
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\n" ); document.write( "\n" ); document.write( "Step 7. ANSWER: Kimberly is 14 years old.\r
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\n" ); document.write( "\n" ); document.write( "I hope the above steps and explanation were helpful. \r
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\n" ); document.write( "\n" ); document.write( "For Step-By-Step videos on Introduction to Algebra, \r
\n" ); document.write( "\n" ); document.write( "please visit http://www.FreedomUniversity.TV/courses/IntroAlgebra and for Trigonometry please visit http://www.FreedomUniversity.TV/courses/Trigonometry. \r
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\n" ); document.write( "\n" ); document.write( "Also, good luck in your studies and contact me at john@e-liteworks.com for your future math needs.\r
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\n" ); document.write( "\n" ); document.write( "Respectfully,
\n" ); document.write( "Dr J\r
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