document.write( "Question 172326: I need help to lear how to solve this kind of Expression:\r
\n" ); document.write( "\n" ); document.write( "If 8x +5=21 then 3x +4=\r
\n" ); document.write( "\n" ); document.write( "How to solve it and what are those expressions called
\n" ); document.write( "Thank you!
\n" ); document.write( "Adriana
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Algebra.Com's Answer #127275 by Mathtut(3670)\"\" \"About 
You can put this solution on YOUR website!
this is an equation and an expression....the expression is dependent upon the outcome of x in the equation.\r
\n" ); document.write( "\n" ); document.write( "if 8x+5=21...then we must find x .... to what 3x+4 =........
\n" ); document.write( "so subtract 5 from both sides
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\n" ); document.write( "8x=16..divide by 2
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\n" ); document.write( "x=2
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\n" ); document.write( "3(2)+4=10
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