document.write( "Question 56838: Grace;s average driving speed is 3 mph faster than Thelma's. In the same length of time it takes Grace to drive 156 miles, Thelma only drives 147 miles. What is Grace's average speed? \n" ); document.write( "
Algebra.Com's Answer #38578 by checkley71(8403)\"\" \"About 
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156/(X+3)=147/X
\n" ); document.write( "156X=147X+441
\n" ); document.write( "156X-147X=441
\n" ); document.write( "9X=441
\n" ); document.write( "X=441/9
\n" ); document.write( "X=45 MPH
\n" ); document.write( "X+3=45+3=48 MPH FOR GRACE\r
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