# SOLUTION: Goodmorning, I need help with this Solve the system by graphing, addition and substitution methods. 3x + y = –1 9x + 3y = –3 Thank you

Algebra ->  Algebra  -> Coordinate Systems and Linear Equations -> SOLUTION: Goodmorning, I need help with this Solve the system by graphing, addition and substitution methods. 3x + y = –1 9x + 3y = –3 Thank you      Log On

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 Click here to see ALL problems on Linear-systems Question 88288: Goodmorning, I need help with this Solve the system by graphing, addition and substitution methods. 3x + y = –1 9x + 3y = –3 Thank youAnswer by rapaljer(4667)   (Show Source): You can put this solution on YOUR website!3x + y = –1 9x + 3y = –3 Multiply both sides of the first equation by -3 to eliminate the y terms. -3*(3x + y) = (-3)*–1 9x + 3y = –3 -9x -3 y = 3 9x + 3y = –3 When you add the equations together you get 0=0, which is ALWAYS TRUE. Any time you get 0=0, it means that the equations actually represent the SAME LINE. The entire line is the solution. R^2