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4 + x = 2
\n" ); document.write( "subtract 4 from both sides of the equation to get:
\n" ); document.write( "4 + x - 4 = 2 - 4
\n" ); document.write( "simplify to get:
\n" ); document.write( "x = -2
\n" ); document.write( "second problem:
\n" ); document.write( "6 + n = 4
\n" ); document.write( "subtract 6 from both sides of the equation to get:
\n" ); document.write( "6 + n - 6 = 4 - 6
\n" ); document.write( "simplify to get:
\n" ); document.write( "n = 4 - 6
\n" ); document.write( "simplify to get:
\n" ); document.write( "n = -2
\n" ); document.write( "-----
\n" ); document.write( "when you are solving equations, you can do the following:
\n" ); document.write( "add the same amount to both sides of the equation.
\n" ); document.write( "subtract the same amount from both sides of the equation.
\n" ); document.write( "multiply both sides of the equation by the same amount.
\n" ); document.write( "divide both sides of the equation by the same amount.
\n" ); document.write( "-----
\n" ); document.write( "doing any of these thing will not change the equality of the equation.
\n" ); document.write( "if the left side was equal to the right side before the operation, it will still be equal to the right side after the operation.
\n" ); document.write( "-----
\n" ); document.write( "you do these things to isolate the variable that you want to solve for on one side of the equation.
\n" ); document.write( "usually it's the left side of the equation but doesn't have to be.
\n" ); document.write( "once the variable has been completely isolated to one side of the equation it has been solved.
\n" ); document.write( "you were left with x = -2 which means that x was solved for.
\n" ); document.write( "you were left with n = -2 which means that n was solved for.\r
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