# SOLUTION: use the substitution method to solve the following system of linear equations. -3x - y = 3 -3x - 5y = -21 what is the solution? (__,__)

Algebra ->  Algebra  -> Coordinate Systems and Linear Equations -> SOLUTION: use the substitution method to solve the following system of linear equations. -3x - y = 3 -3x - 5y = -21 what is the solution? (__,__)      Log On

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 Click here to see ALL problems on Linear-systems Question 220147: use the substitution method to solve the following system of linear equations. -3x - y = 3 -3x - 5y = -21 what is the solution? (__,__)Answer by checkley77(12569)   (Show Source): You can put this solution on YOUR website!-(-3x - y = 3 ) multiply this equation by -1 & add. -3x - 5y = -21 --------------------- -4y=-24 -4y=-24 y=-24/-4 y=6 ans. -3x-6=3 -3x=3=6 -3x=9 x=9/-3 x=-3 ans. Proof: -3*-3-5*6=-21 9-30=-21 -21=-21 what is the solution? (-3,6)