Need Help with equations?? Any Help Plz :)
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Need Help with equations?? Any Help Plz :)

[From: ] [author: ] [Date: 11-05-14] [Hit: ]
What do we see here? We see a positive 6x and a negative 6x. With elimination, we add the problem from top to bottom: 7y-3y=4y, 6x-6x=0, 6+18=24.......
I need help on how to do these
3y=6x-18
7y=6x+6
How would i do this and put the answer in an ordered pair

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To do this, you would use elimination, which you may or may not have learned yet.
For neatness's sake, let's put 7y=6x+6 on top first.
7y=6x+6
3y=6x-18
So first you can see that they both have a 6x. Math properties make it so that a positive equation equals the same thing negative. Therefore, 3y=6x-18 is the same as -3y=-6x+18.
This is the neat part.
7y=6x+6
-3y=-6x+18
What do we see here? We see a positive 6x and a negative 6x. With elimination, we add the problem from top to bottom: 7y-3y=4y, 6x-6x=0, 6+18=24.
4y=24
We divide...
y=6
Then we go back to one of the original problems. Since we know y, we can substitute.
18=6x-18
We add eighteen to both sides.
36 = 6x
Divide.
x = 6

The answer is (6,6).

hope i helped!

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3y=6x-18
7y=6x+6

the easiest way is to make both equal to 6x,

then combine and solve.

6x = 3y-18 and 6x = 7y - 6

7y - 6 = 3y-18

subtract 3y to give

4y -6 = -18

add 6

4y = -12

y = -3

substitute into 3y=6x-18 to give -12 = 6x - 18

add 18

6 = 6x

x = 1

solution as an ordered pair is ( 1,-4).

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7y = 6x +6
3y = 6x -- 18
Subtract you get 4y = 24 whence y = 6
6x + 6 = 7y becomes 6x + 6 = 7(6) OR 6x = 36 whence x = 6
x = 6, y = 6
1
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