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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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 down
Found 2 solutions by jojo14344, Earlsdon:
Answer by jojo14344(1513) (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(6294) (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:
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