document.write( "Question 392557: solve the proportion 5/7 = 20/d \n" ); document.write( "

Algebra.Com's Answer #278617 by haileytucki(390) $\"\"$ $\"About$

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(5)/(7)=(20)/(d)\r
\n" ); document.write( "\n" ); document.write( "Since d is on the right-hand side of the equation, switch the sides so it is on the left-hand side of the equation.
\n" ); document.write( "(20)/(d)=(5)/(7)\r
\n" ); document.write( "\n" ); document.write( "Since there is one rational expression on each side of the equation, this can be solved as a ratio. For example, (A)/(B)=(C)/(D) is equivalent to A*D=B*C.
\n" ); document.write( "20*7=5*d\r
\n" ); document.write( "\n" ); document.write( "Since d is on the right-hand side of the equation, switch the sides so it is on the left-hand side of the equation.
\n" ); document.write( "5*d=20*7\r
\n" ); document.write( "\n" ); document.write( "Multiply 5 by d to get 5d.
\n" ); document.write( "5d=20*7\r
\n" ); document.write( "\n" ); document.write( "Multiply 20 by 7 to get 140.
\n" ); document.write( "5d=140\r
\n" ); document.write( "\n" ); document.write( "Divide each term in the equation by 5.
\n" ); document.write( "(5d)/(5)=(140)/(5)\r
\n" ); document.write( "\n" ); document.write( "Simplify the left-hand side of the equation by canceling the common factors.
\n" ); document.write( "d=(140)/(5)\r
\n" ); document.write( "\n" ); document.write( "Simplify the right-hand side of the equation by simplifying each term.
\n" ); document.write( "d=28 \n" ); document.write( "

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