cobyt515 cobyt515

15-06-2017
Mathematics

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7x - 3y = 4
2x - 4y = 1

The solution to the system of equations is _____.

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quynhtrang27899 quynhtrang27899

15-06-2017

7x - 3y = 4 => 7x = 3y + 4 => x = (3y + 4) / 7 2x - 4y = 1 => 2x = 4y + 1 => x = (4y + 1) / 2
=> (3y + 4) / 7 = (4y + 1) / 2 (3y + 4) * 2 = (4y +1) * 7 6y + 8 = 28y + 7 22y = 1 Y = 1/22 =>you can substitute y for the system of equations and find x

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