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Given that x+y = 7 and 3x+y = 45, evaluate x^2-y^2.
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Given that x+y = 7 and 3x+y = 45, evaluate x^2-y^2.

User Irrelephant
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Alright, If x+y=7 then y=7-x. If we plug that in then 3x+7-x=45 leads that 2x+7=45 so 2x=38, therefore, x=19 now if x+y=7 and x=29 we know that y=-22. Hope this helped! Try finding the answer now!

User Akronix
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