document.write( "Question 310639: \n" ); document.write( "
Algebra.Com's Answer #222132 by PRMath(133)\"\" \"About 
You can put this solution on YOUR website!
Evaluate the variable expression when .a=-1/4, b=7/8, and c=1/8
\n" ); document.write( "8a + (7b -c)\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Just \"plug\" in the info you are given, like this:\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "a = \"-1%2F4\"
\n" ); document.write( "b = \"7%2F8\"
\n" ); document.write( "c = \"1%2F8\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "8a + (7b - c) (original equation)
\n" ); document.write( "8\"%28-1%2F4%29\" + (\"7%287%2F8%29\" - \"1%2F8\") (see where the fractions are substituted in for the variables?)
\n" ); document.write( "\"-8%2F4%29\" + \"%2849%2F8++++-++++1%2F8%29\" (If you multiply 8 times \"-1%2F4\" you will get \"-8%2F4\" and... If you multiply 7 times \"7%2F8\" you will get \"49%2F8\")
\n" ); document.write( "\"-8%2F4+%2B+48%2F8\" (If you subtract: \"49%2F8+-+1%2F8\" you get: \"48%2F8\")
\n" ); document.write( "\"-2+%2B+6\" (Reduce the fractions: \"-8%2F4+=+-2\" and \"48%2F8+=+6\")
\n" ); document.write( "\"4\" (if you take -2 + 6 you will get 4)\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "I hope this helps you. :-)
\n" ); document.write( "
\n" );