document.write( "Question 196550: Explain how we evaluate an algebraic expression for given values of the variables. How would we evaluate the expression \"3x - 4y + 9\" when x = 2 and y = 5? \n" ); document.write( "
Algebra.Com's Answer #147315 by checkley77(12844)\"\" \"About 
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3x-4y+9
\n" ); document.write( "If x=2 & y=5 then:
\n" ); document.write( "3*2-4*5+9=6-20+9=15-20=-5 ans.
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