# SOLUTION: Solve this system of equations using the elimination method: 3a-3b=-15 -3a-3b=-3 please explain steps thank you

Algebra ->  Algebra  -> Systems-of-equations -> SOLUTION: Solve this system of equations using the elimination method: 3a-3b=-15 -3a-3b=-3 please explain steps thank you      Log On

 Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations! Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!

 Algebra: Systems of equations that are not linear Solvers Lessons Answers archive Quiz In Depth

 Question 612885: Solve this system of equations using the elimination method: 3a-3b=-15 -3a-3b=-3 please explain steps thank youAnswer by jim_thompson5910(28476)   (Show Source): You can put this solution on YOUR website!Simply add the equations to get 3a-3b=-15 -3a-3b=-3 --------- 0a-6b=-18 So -6b = -18 b = -18/(-6) b = 3 Now that we know that b = 3, we can use this to find 'a'. 3a-3b=-15 3a-3(3)=-15 3a-9=-15 3a=-15+9 3a=-6 a = -6/3 a = -2 So the solutions are a = -2 and b = 3 giving us the ordered pair (-2,3)