Weegy: solve for y or x in one equation then, insert that into the other equation in place of the variable you solved for. Expert answered|speedycross09|Points 162|

7x-4y=60 multiple 2 on both sides: 14x - 8y = 120 (equation 1) 2x-5y=21 multiple 7 on both sides: 14x - 35y = 147 (equation 2) eqution 1 - equation 2 the result is: 27y = -27 y = -27/27 = -1; 7x-4(-1)=60, 7x + 4 = 60 7x = 60 - 4 = 56 x = 56/7 = 8; The solution for the system 7x-4y=60 2x-5y=21 is (8, -1)

7x-4y=60 multiple 2 on both sides: 14x - 8y = 120 (equation 1) 2x-5y=21 multiple 7 on both sides: 14x - 35y = 147 (equation 2) eqution 1 - equation 2 the result is: 27y = -27 y = -27/27 = -1; 7x-4(-1)=60, 7x + 4 = 60 7x = 60 - 4 = 56 x = 56/7 = 8; The solution for the system 7x-4y=60 2x-5y=21 is (8, -1)

Added 5/25/2014 11:57:43 PM

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