document.write( "Question 69430This question is from textbook Beginning Algebra
\n" ); document.write( ": plotting ordered pairs so that each is a solution for the given equation:
\n" ); document.write( "This is my problem 3x+4y=12 (0, ) ( ,3/4) ( ,0) (8/3, ) I have spent about 4 hours working on this. I tried solving for both x and y then plugging the number in. That didnt work out. I have tried graphing it to see if I could make more sense out of it that way, and that didnt help me much, and I believe it confused me worse. PLease Help!! \n" ); document.write( "
Algebra.Com's Answer #49451 by tutorcecilia(2152)\"\" \"About 
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3x+4y=12 [solve for y]
\n" ); document.write( "3x-3x+4y=-3x+12
\n" ); document.write( "4y=-3x+12
\n" ); document.write( "4y/4=-3x/4+12/4
\n" ); document.write( "y=-3/4x+3 [this is the equation of the line. from here, plug-in the known variable and solve for the missing variable]
\n" ); document.write( ".
\n" ); document.write( "y=-3/4x+3 (let x=0 and solve for y]
\n" ); document.write( "y=-3/4(0)+3
\n" ); document.write( "y=0+3
\n" ); document.write( "y=3
\n" ); document.write( "(0,3)
\n" ); document.write( ".
\n" ); document.write( "y=-3/4x+3 (let y=3/4 and solve for x]
\n" ); document.write( "3/4=-3/4x+3
\n" ); document.write( "3/4-3=-3/4x+3-3
\n" ); document.write( "-9/4=-3/4x
\n" ); document.write( "(-9/4)(-4/3)=x
\n" ); document.write( "3=x
\n" ); document.write( "(3, 3/4)
\n" ); document.write( ".
\n" ); document.write( "y=-3/4x+3 (let y=0 and solve for x]
\n" ); document.write( "0=-3/4x+3
\n" ); document.write( "-3=-3/4x
\n" ); document.write( "(-4/3)(-3/1)=-3/4x(-4/3)
\n" ); document.write( "4=x
\n" ); document.write( "(4,0)
\n" ); document.write( ".
\n" ); document.write( "y=-3/4x+3 (let x=8/3 and solve for y]
\n" ); document.write( "y=-3/4(8/3)+3
\n" ); document.write( "y=-2+3
\n" ); document.write( "y=1
\n" ); document.write( "(8/3, 1) \n" ); document.write( "
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