document.write( "Question 228989: In 1985,B is 13. A is 43. In what year will B be 2/5 of A's age? \n" ); document.write( "
Algebra.Com's Answer #169901 by checkley77(12844)\"\" \"About 
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(13+X)=2/5(43+X)
\n" ); document.write( "13+X=86/5+2X/5
\n" ); document.write( "X-2X/5=86/5-13
\n" ); document.write( ".6X=(86-13*5)/5
\n" ); document.write( ".6X=(86-65)/5
\n" ); document.write( ".6X=21/5
\n" ); document.write( "X=(21/5)/.6
\n" ); document.write( "X=21/5*1/.6
\n" ); document.write( "X=21/3
\n" ); document.write( "X=7 YEARS AFTER 1985 OR 1992 B WILL BE 2/5 THE AGE OF A.
\n" ); document.write( "PROOF:
\n" ); document.write( "13+7=2/5(43+7)
\n" ); document.write( "20=2/5*50
\n" ); document.write( "20=100/5
\n" ); document.write( "20=20
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