document.write( "Question 1132992: If the average of x,y,z,and 90 is 20 less than the average of y,z,w,and 100, what is the value of w - x? \n" ); document.write( "
Algebra.Com's Answer #750153 by josgarithmetic(39617)\"\" \"About 
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\"%28x%2By%2Bz%2B90%29%2F4=%28w%2By%2Bz%2B100%29%2F4-20\"\r
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\n" ); document.write( "\n" ); document.write( "\"x%2By%2Bz%2B90=w%2By%2Bz%2B100-80\"\r
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\n" ); document.write( "\n" ); document.write( "\"0=w%2By%2Bz%2B100-80-x-y-z\"\r
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\n" ); document.write( "\n" ); document.write( "\"w-x=100-80\"\r
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\n" ); document.write( "\n" ); document.write( "\"w-x=20\"
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