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\n" ); document.write( "\"Eighteen is...\"
\n" ); document.write( "The \"is\" is the equals sign:
\n" ); document.write( "18 = ...
\n" ); document.write( "\"Eighteen is fifteen less than...\"
\n" ); document.write( "\"..fifteen less than...\" indicates the 15 is going to be subtracted from something; we don't yet know what that something is:
\n" ); document.write( "18 = ??? - 15
\n" ); document.write( "\"Eighteen is fifteen less than the product of a number and three.\"
\n" ); document.write( "Now we know what the fifteen is being subtracted from -- the product of a number and 3:
\n" ); document.write( "18 = (x)(3) - 15
\n" ); document.write( "That is how the mathematical statement looks if we translate the words as directly as possible. In the usual mathematical form the statement would be
\n" ); document.write( "18 = 3x - 15
\n" ); document.write( "Solve using basic algebraic steps.
\n" ); document.write( "Add 15 to both sides to get the x term alone:
\n" ); document.write( "18+15 = 3x-15+15
\n" ); document.write( "33 = 3x
\n" ); document.write( "Divide both sides by 3 to get x alone:
\n" ); document.write( "33/3 = 3x/3
\n" ); document.write( "11 = x
\n" ); document.write( "ANSWER: the number is 11
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