document.write( "Question 698828: Find the variables and the measure of each angle.
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document.write( "two lines cross each other like an X.
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document.write( "the top is (x+y+5) degrees
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document.write( "the one on the right is (2x) degrees
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document.write( "and the one to the left is (y) degrees
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document.write( "I have tried over and over to solve this problem but I don't know how to solve it with two variables.
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Algebra.Com's Answer #431058 by Simnepi(216)![]() ![]() You can put this solution on YOUR website! When two straight lines cross opposite angles are equal. \n" ); document.write( "From your description the angle y and the angle 2x are opposite each other. Therefore they are the same. \n" ); document.write( "So now we know that y = 2x. \n" ); document.write( "This means that the top angle in your diagram can be written \n" ); document.write( "(x+2x+5) degrees \n" ); document.write( "This is the same as 3x+5. \n" ); document.write( "Look at your diagram and cover the left and bottom angles with a piece of paper. \n" ); document.write( "You should see that the top angle and the angle on the right are on a straight line. you should know that angles on a line add up to 180 degrees. \n" ); document.write( "So now we can say that \n" ); document.write( "3x+5 + 2x = 180 \n" ); document.write( "which means that \n" ); document.write( "5x + 5 = 180 \n" ); document.write( "therefore \n" ); document.write( "5x = 175 \n" ); document.write( "and so \n" ); document.write( "x = 35 degrees \n" ); document.write( "Now you can see that \n" ); document.write( "y = 70 degrees (2 times 35)(the same as the 2x angle, remember they're equal when they're opposite) \n" ); document.write( "and the top angle is \n" ); document.write( "35 + 70 + 5 = 110 degrees \n" ); document.write( "The bottom angle is the same as the top (they're opposite angles too!) \n" ); document.write( " |