document.write( "Question 95080: Please help me with : Define a variable and write an algebraic expression for this phrase........the difference of 8 and a number. Please explain a variable for me. Thank You \n" ); document.write( "
Algebra.Com's Answer #69170 by tutorcecilia(2152)\"\" \"About 
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A variable is an unknown number that will change or variable depending on the equation or math problem. Usually a variable is represented by x, y or z.
\n" ); document.write( "When the correct number for the variable or variables are plugged into the problem, it will make the problem (or equation) a true statement.\r
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\n" ); document.write( "Difference means to subtract two numbers:
\n" ); document.write( "8-x
\n" ); document.write( "\"x\" can vary or change. Since this is not an equation, \"x\" can equal any number.
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\n" ); document.write( "But if 8-x=2
\n" ); document.write( "Than \"x\" can only equal 6
\n" ); document.write( "8-6=2 becasue no other number will make this a true statement.\r
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\n" ); document.write( "I hope this helps!
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