2x-4y=12,x+4y=18?

Answer 1

2x-4y=12---(1)
x+4y=18----(2)

(1)+(2)

2x+x=12+18
3x=30
x=10#

substitute x=10 into (1)
2x-4y=12
2(10)-4y=12
20-12=4y
8=4y
y=2#

Answer 2

remedy for y to locate the slope: 2x + 4y = 18 4y = 18-2x y= 18/4 - 2/4x with the aid of fact of this -2/4 (or -a million/2) is the slope of your line. The question isn't probable clean on which coordinates you desire, however the factor the place x=0 is y= 9/2 and the factor the place y = 0 is x=9/2.

Answer 3

2x - 4y = 12 (equation 1)
x + 4y = 18 (equation 2)

From equation 2:
x + 4y = 18
x = 18 - 4y (equation 3)

Substitute equation 3 into equation 1:
2x - 4y = 12
2(18 - 4y) - 4y = 12
36 - 8y - 4y = 12
-12y = 12 - 36
-12y = -24
y = -24/-12
y = 2

Substitute y = 2 into equation 3:
x = 18 - 4y
x = 18 - 4(2)
x = 18 - 8
x = 10

Therefore, x = 10, y = 2 (final answer)

Answer 4

Solve x + 4y = 18 for x
x = 18 - 4y
Substitute into 1st equation:
2(18 - 4y) - 4y = 12
Solve for y:
36 - 8y - 4y = 12
36 -12y = 12
-12y = -24
y = 2
Sustitute into 2nd equation:
x + 4(2) = 18
x + 8 = 18
x = 10

Answer 5

Isolate a variable (in this case, x is easiest.)

x+4y=18
x=18-4y

Plug this into the other equation...

2(18-4y)-4y=12
36-8y-4y=12
36-12y=12
-12y=-24
y=2

Plug that into the first equation...

x+4(2)=18
x+8=18
x=10

Answer 6

2x-4y=12
x+4y=18

one of the methods you can use to solve this includes the addition method.

-4y and 4y cancel (because their opposites) and so..

3x=30 (add the like terms)
x=10

then solve for y:
10+4y=18
4y=8
y=2

try it:
2(10)-4(2)=12
20-8=12 [:

Answer 7

2x-4y = 12...................(1)
x+4y = 18...................(2) x 2

2x-4y=12
2x+8y=36...........minus
_________
-12y=-24
y=2
substitute y=2 into equation (2)

x+4(2)=18
x+8 =18
x =18-8
=10

so, y=2 and x=10

Answer 8

2x-4y=12--------->(1)
x+4y=18--------->(2)


Adding both system of equations......
we get,
3x=30;
Hence x=10;


Putting value of x in (1)
2x-4y=12;
we get,
2*10-4y=12;
or, 20-12=4y;
or, 8=4y;
or 2=y;



Therefore x=10 and y=2..............

Answer 9

2x - 4y = 12
x + 4y = 18

a good way to do this one is add the equations together...
3x=30, x = 10.
plug x into one of them and find y.
10 + 4y = 18, 4y = 8, y = 2.

S={(10,2)}.

Answer 10

3x = 30
x = 10
10 + 4y = 18
4y = 8
y = 2
Solution is x = 10 , y = 2