Step-by-step EXPLANATION:x + y = 7 => y = 7 - x ----( 1 ) 3X - y = 1 ----( 2 ) Substitute y = 7 - x in equation ( 2 ), we get 3x - ( 7 - x ) = 1 => 3x - 7 + x = 1 => 4x = 8 => x = 8/2 => x = 4 Put x = 4 in equation ( 1 ), we get y = 7 - 4 => y = 3 THEREFORE , ( x , y ) = ( 4 , 3 ) markme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plzmarkme as brainlist plz