document.write( "Question 883192: Twice Jack's age plus 5 is 21. Write and solve an equation. How old is Jack?
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Algebra.Com's Answer #533367 by josmiceli(19441) $\"\"$ $\"About$

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Let Jack's age = $\"+x+\"$
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\n" ); document.write( " $\"+2x+%2B+5+=+21+\"$
\n" ); document.write( "Subtract $\"+5+\"$ from both sides
\n" ); document.write( " $\"+2x+=+16+\"$
\n" ); document.write( "Divide both sides by $\"+2+\"$
\n" ); document.write( " $\"+x+=+8+\"$
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\n" ); document.write( "Jack is 8
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