document.write( "Question 264508: one number is four greater than another number when three times the smaller number is added to twice the larger number the result is 43.\r
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document.write( "Could you please give me the method to work it out i know the answer is 7 i just don't know how to get there. \n" );
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Algebra.Com's Answer #194746 by PRMath(133)![]() ![]() ![]() You can put this solution on YOUR website! Just break down what you are given, like this:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "One number (make it \"x\") \n" ); document.write( "is (=) \n" ); document.write( "four greater (4 +) \n" ); document.write( "than another number (make it \"y\"): \n" ); document.write( "EQUATION: x = 4 + y\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "when three times the smaller number (the smaller number is y, so 3 times y: 3y) is added (3y +)to \n" ); document.write( "twice the larger number (2 times the larger: 2x) \n" ); document.write( "the result is (=) 43. \n" ); document.write( "EQUATION: 3y + 2x = 43\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Now you have TWO equations: \n" ); document.write( "x = 4 + y \n" ); document.write( "3y + 2x = 43\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Solve this system. Do you see that x = 4 + y? SO instead of \"X\" in the 2nd equation, put in 4 + y, like this:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "3y + 2x = 43 (original equation) \n" ); document.write( "3y + 2(4 + y) = 43 (Plugged in 4 + y for the \"X\" variable) \n" ); document.write( "3y + 8 + 2y = 43 (distributed 2 to the 4 and 2 to the y) \n" ); document.write( "5y + 8 = 43 (combined like terms) \n" ); document.write( "5y = 35 (subtracted 8 from both sides to isolate the y) \n" ); document.write( "y = 7 (divided both sides by 5 to further isolate the y)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Now we know y = 7. \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Plug in 7 for the \"Y\" variable in the 1st equation\r \n" ); document.write( "\n" ); document.write( "x = 4 + Y \n" ); document.write( "x = 4 + 7 \n" ); document.write( "x = 11. \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Soooooooo one number is 7 and one number is 11.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "11 is 4 greater than 7 (the smaller number) and......\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "3 times the smaller number (3)(7) is 21 added to 2 times the larger (2)(11) is 22, is 43. \r \n" ); document.write( "\n" ); document.write( "21 + 22 = 43. Yay. \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "I hope this helps you. \n" ); document.write( " |