document.write( "Question 625855: the sum of two numbers is 56. one third of the first number plus one fourth of the second number is 16. find the numbers.\r
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document.write( "please give solution in variables x and y. use also formula and explain clearly thanks.. \n" );
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Algebra.Com's Answer #393828 by NewtonMathCenter(2) ![]() You can put this solution on YOUR website! Let x=first number and y=second number. \n" ); document.write( "The sum of two numbers is 56 can be represented as x+y=56. \n" ); document.write( "One third of the first number plus one fourth of the second number is 16 can be written as (1/3)x+(1/4)y=16. Remember of represents multiplication. \n" ); document.write( "Now we can solve this system of equations by either substitution or elimination. I will do elimination. Thus I will multiply the second equation by 12, the lowest common denominator, to eliminate all of the fractions:) We then get \n" ); document.write( "4x+3y=192. I will now multiply the first equation by -3 so we can add the two equations and eliminate the y variable. We then get -3x-3y=-168. Now add the two equations: \n" ); document.write( "4x+3y=192 \n" ); document.write( "-3x-3y=-168 \n" ); document.write( "x=24 \n" ); document.write( "To solve for y, substitute the x into any original equation: \n" ); document.write( "x+y=56 \n" ); document.write( "24+y=56 \n" ); document.write( "y=32 by subtracting 24 from both sides. \n" ); document.write( "Now you can check your answer: \n" ); document.write( "24+32=56 yes \n" ); document.write( "(1/3)24+(1/4)32=16 yes \n" ); document.write( "Yay:) \n" ); document.write( " \n" ); document.write( " |