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49x - 57y = 172; 57x - 49y = 252

49x - 57y = 172; 57x - 49y = 252

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49x - 57y = 172 ... (I) 57x - 49y = 252 ... (II) Let's add the two given equations 49x - 57y = 172 +57x - 49y = 252 ___________________ 106x - 106y = 424 Dividing both sides by 106 x - y = 4 ... (III) Now, let's subtract equations (II) from (I) 49x - 57y = 172 -57x - 49y = 252 ___________________ -2y = -6 ? y = 3 Place this value in eqaution (III) x - y = 4 ? x - 3 = 4 ? x = 4 + 3 ? x = 7 x = 7, y = 3 is the solution. Place this value in equation (III)
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