document.write( "Question 154426: samantha charges $27.28 for 14 tacos and 6 buritos and $18.52 for 8 tacos and 6 burritos determine the cost of one burrito and one taco \n" ); document.write( "
Algebra.Com's Answer #113720 by nerdybill(7384)![]() ![]() You can put this solution on YOUR website! samantha charges $27.28 for 14 tacos and 6 buritos and $18.52 for 8 tacos and 6 burritos determine the cost of one burrito and one taco \n" ); document.write( ". \n" ); document.write( "Assign variables to things you don't know: \n" ); document.write( "Let t = cost of a taco \n" ); document.write( "and b = cost of a burrito \n" ); document.write( ". \n" ); document.write( "Since you have two unknowns, you'll need to find two equations. \n" ); document.write( ". \n" ); document.write( "From: \"samantha charges $27.28 for 14 tacos and 6 burritos\" we get equation 1: \n" ); document.write( "14t + 6b = 27.28 \n" ); document.write( ". \n" ); document.write( "From: \"$18.52 for 8 tacos and 6 burritos\" we get equation 2: \n" ); document.write( "8t + 6b = 18.52 \n" ); document.write( ". \n" ); document.write( "The two equations are: \n" ); document.write( "14t + 6b = 27.28 \n" ); document.write( "8t + 6b = 18.52 \n" ); document.write( ". \n" ); document.write( "If we were to multiply both sides of equation by a -1 we'll get: \n" ); document.write( "14t + 6b = 27.28 \n" ); document.write( "-8t - 6b =-18.52 \n" ); document.write( ". \n" ); document.write( "We can now ADD the two equations to eliminate b's: \n" ); document.write( "14t + 6b = 27.28 \n" ); document.write( "-8t - 6b =-18.52 \n" ); document.write( "----------------- \n" ); document.write( " 6t = 8.76 \n" ); document.write( "Dividing both sides by 6: \n" ); document.write( " t = $1.46 (cost of a taco) \n" ); document.write( ". \n" ); document.write( "Plug the above into equation 2 and solve for b: \n" ); document.write( "8t + 6b = 18.52 \n" ); document.write( "8(1.46) + 6b = 18.52 \n" ); document.write( "11.68 + 6b = 18.52 \n" ); document.write( "6b = 6.84 \n" ); document.write( "b = $1.14 (cost of a burrito) \n" ); document.write( " \n" ); document.write( " |