document.write( "Question 260542: u - 1.96t = 10
\n" ); document.write( "u + 1.96t = 30 \n" ); document.write( "

Algebra.Com's Answer #191931 by onlinetutor365.com(14) $\"\"$ $\"About$

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u - 1.96t = 10 --(1)
\n" ); document.write( "u + 1.96t = 30 --(2)
\n" ); document.write( "Add (1)+ (2) ==> 2u=40
\n" ); document.write( " u=40/2
\n" ); document.write( " u=20
\n" ); document.write( "Put u value into (1) ==> 20-1.96t=10
\n" ); document.write( " -1.96t=10-20
\n" ); document.write( " -1.96t=-10
\n" ); document.write( " 1.96t=10
\n" ); document.write( " t=10/1.96
\n" ); document.write( " t=5.102
\n" ); document.write( "Therefore, u=20 and t=5.102 \n" ); document.write( "

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