document.write( "Question 914283: i add 7 to a certain number .i double the result my final answer is 34 what was my number \n" ); document.write( "
Algebra.Com's Answer #554989 by fave(7)\"\" \"About 
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let a be the certain number and let b be the result from the addition
\n" ); document.write( "That is 7+a=b
\n" ); document.write( " 2b=34
\n" ); document.write( " b=17
\n" ); document.write( "7+a=17
\n" ); document.write( "a=17-7=10
\n" ); document.write( "your number is 10
\n" ); document.write( "
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