A System of Equations #maths #algebra #exam #sybermath

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( a + b )( x + y ) = 10( x + y ) = 20

x + y = 2 , x - y = 4 => x = 3, y = - 1

( a - b )( x - y ) = ( a - b ) 4 = 8

a - b = 2, a + b = 10 => a = 6, b = 4

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mircoceccarelli