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You can put this solution on YOUR website!
4x-7=2x+15
\n" ); document.write( "Think of the equals sign as a balence point. You're balencing the left side with
\n" ); document.write( "the right side. like this:
\n" ); document.write( "stuff = stuff
\n" ); document.write( "junk = junk
\n" ); document.write( "junk + stuff = junk + stuff
\n" ); document.write( "also
\n" ); document.write( "junk + stuff = stuff + junk (you don't care about the order)
\n" ); document.write( "3x(junk) = 3x(junk) (it still balences)
\n" ); document.write( "so,
\n" ); document.write( "4x-7=2x+15 must be like stuff = stuff, right?
\n" ); document.write( "You balence this by taking away the same amount of stuff from both sides
\n" ); document.write( "or adding the same amount of stuff to both sides
\n" ); document.write( "first add 7 to both sides
\n" ); document.write( "4x -7 +7 = 2x +15 +7
\n" ); document.write( "now just do the addition
\n" ); document.write( "4x = 2x + 22
\n" ); document.write( "Now subtract 2x from both sides
\n" ); document.write( "4x - 2x = 2x - 2x + 22
\n" ); document.write( "do the subtraction
\n" ); document.write( "2x = 22
\n" ); document.write( "Now divide both sides by 2 (that doesn't change the balence either)
\n" ); document.write( "x = 11
\n" ); document.write( "that's the answer
\n" ); document.write( "You can check it by plugging it into the equation
\n" ); document.write( "you started with
\n" ); document.write( "4*(11) - 7 = 2*(11) + 15
\n" ); document.write( "do the multiplications
\n" ); document.write( "44 - 7 = 22 + 15
\n" ); document.write( "Is this true?
\n" ); document.write( "37 = 37
\n" ); document.write( "Yes, it is!
\n" ); document.write( "It's simple if you know the rules and you look at it
\n" ); document.write( "the right way. stuff = stuff\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "