SOLUTION: On my homework it says:
Solve the system of equations through elimination.
2x-3y=21
-6x+2y=7
I have tried so many times but can't figure it out. And how do I know whether to
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Coordinate Systems and Linear Equations
-> SOLUTION: On my homework it says:
Solve the system of equations through elimination.
2x-3y=21
-6x+2y=7
I have tried so many times but can't figure it out. And how do I know whether to
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Question 1007851: On my homework it says:
Solve the system of equations through elimination.
2x-3y=21
-6x+2y=7
I have tried so many times but can't figure it out. And how do I know whether to add or subtract?
I'd greatly appreciate it if I could be taught HOW to solve this, not just the answer.
Thank You! Found 2 solutions by tiffany222, MathLover1:Answer by tiffany222(56) (Show Source):
You can put this solution on YOUR website! 2x - 3y = 21
-6x + 2y = 7
Step 1: Eliminate either x or y to solve for one value. In this problem, we will eliminate x by multiplying the first equation by 3.
6x - 9y = 63
-6x + 2y = 7
Step 2: Add the two equations to eliminate x and solve for y. We add because we want the x coefficient to become 0.
-7y = 70
y = -10
Step 3: Substitute the y value we just got into either one of the two original equations to get the x value. I decided to use the first equation, but using the second equation will also get you the right answer.
2x - 3y = 21
2x - 3(-10) = 21
2x + 30 = 21
2x = -9
x = -4.5
Final Answer:
x = -4.5
y = -10
You can put this solution on YOUR website!
Solve the system of equations through elimination. .....eq.1.........both sides multiply by .........eq.2
-----------------------------
.....eq.1 .........eq.2
-----------------------------add both eq.1 and eq.2
.......eliminate and
now go back to .........eq.2, substitute for and find or
so, these two lines intersect at point (,)
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