document.write( "Question 93529: How do you work these problems? I have no Idea where to start! Help!\r
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document.write( "Solve and graph the solution:\r
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document.write( "-12 is greater than or equal to 24x \n" );
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Algebra.Com's Answer #68110 by bucky(2189)![]() ![]() ![]() You can put this solution on YOUR website! In equation form you are given: \n" ); document.write( ". \n" ); document.write( " \n" ); document.write( ". \n" ); document.write( "You can pretty much work these using the same procedures that you would to solve an equation. \n" ); document.write( ". \n" ); document.write( "However, there is an exception. This exception is that in solving for x if you ever have to \n" ); document.write( "MULTIPLY or DIVIDE both sides by a NEGATIVE quantity, then you also have to reverse the \n" ); document.write( "direction of the inequality sign. \n" ); document.write( ". \n" ); document.write( "Let's work this problem. \n" ); document.write( ". \n" ); document.write( "If this were an equation, you would solve for x by dividing both sides by 24 because 24 \n" ); document.write( "is the multiplier of x. So let's divide both sides by +24 to get: \n" ); document.write( ". \n" ); document.write( " \n" ); document.write( ". \n" ); document.write( "Notice that on the left side if you divide both the numerator and denominator by 12 you are \n" ); document.write( "left with \n" ); document.write( "in the denominator. Therefore, all you are left with is: \n" ); document.write( ". \n" ); document.write( " \n" ); document.write( ". \n" ); document.write( "That's the answer. Now, what does it mean? It says that \n" ); document.write( "to x. (Remember that the inequality sign always points to the smaller quantity.) \n" ); document.write( ". \n" ); document.write( "This also means the same as x is less than or equal to \n" ); document.write( "graphing this answer, you can draw a number line. Then put a dot at the point \n" ); document.write( "x can have that value. x can also be less than that number. That means that x can be any \n" ); document.write( "value to the left of the point at \n" ); document.write( "point \n" ); document.write( ". \n" ); document.write( "Hopefully this makes some sense to you. In solving this problem we didn't have to multiply \n" ); document.write( "or divide both sides by a negative number, so we didn't need to use the rule about \n" ); document.write( "changing the direction of the inequality sign. It just stayed the same direction \n" ); document.write( "throughout all our work. \n" ); document.write( ". \n" ); document.write( "Remember the goal is to solve inequalities for +x. If you have a problem that you can solve \n" ); document.write( "for -x, then do so. But at the very end of the problem you will need to multiply the -x by \n" ); document.write( "-1 to change it to +x. And when you multiply one side by -1 you must also multiply the \n" ); document.write( "other side by -1 ... and that means that you also need to reverse the direction of the \n" ); document.write( "inequality sign because you multiplied both sides by a minus number. \n" ); document.write( " |