# SOLUTION: 2x-3y =18 and 5x +3y =3 solutions ( 3 ,4) dont understand how my book got the solution 3 need a full break down

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

 Question 187386: 2x-3y =18 and 5x +3y =3 solutions ( 3 ,4) dont understand how my book got the solution 3 need a full break downFound 2 solutions by jojo14344, Earlsdon:Answer by jojo14344(1512)   (Show Source): You can put this solution on YOUR website! Given In EQN 1 we get: ----> EQN 3, subst. in EQN 2: ---->---->---> , Subst. in EQN 3: Therefore, point of Intersection (3,-4) We see graph: --> RED Line (EQN 1); GREEN Line (EQN 2) Thank you, Jojo Answer by Earlsdon(6287)   (Show Source): You can put this solution on YOUR website!Solve: Add these two equations: -------------- Divide both sides by 7. Now substitute this value of x into either one of the two given equations and solve for y. Substitute x = 3. Simplify. Subtract 15 from both sides. Finally, divide both sides by 3. The solution is (3, -4) See the graph, the solution is the point of intersection of the two lines: