x+y=12,2x-y=9,then 6x-2y=?

x + y = 12
2x - y = 9------ADD

3x = 21
x = 7
y = 5

6x - 2y = 42 - 10 = 32

x + y = 12
y = 12 - x

2x - y = 9
y = 2x - 9

12 - x = 2x - 9
3x = 21
x = 7

y = 12 - 7
y = 5

Then:
= 6(7) - 2(5)
= 42 - 10
= 32

Answer: 6x - 2y = 32

32(x=7, y=5)

32.

in the event that they have been crossed then x^2-7x+13 = 0 equation might have the determination. yet we've: x^2-6x+10 = x-3, x^2-7x+13 = 0, D = 40 9 - fifty two = -3 < 0 and this equation is'n solvable.

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x+y=12|2x-y=9

x,y | y
-10,22 | -29
-9,21 | -27
-8,20 | -25
-7,19 | -23
-6,18 | -21
-5,17 | -19
-4,16 | -17
-3,15 | -15
-2,14 | -13
-1,13 | -11
0,12 | -9
1,11 | -7
2,10 | -5
3,9 | -3
4,8 | -1
5,7 | 1
6,6 | 3
7,5 | 5 INTERSECT
8,4 | 7
9,3 | 9
10,2 | 11

6x-2y=?
6(7)-2(5)=?
42-10=32
32

x + y = 12
x = 12 - y
2x = 2(12 - y)

2x - y = 9
2(12 - y) - y = 9
24 - 2y - y = 9
-2y - y = 9 - 24
-3y = -15
y = -15/-3
y = 15/3
y = 5

x + y = 12
x + 5 = 12
x = 12 - 5
x = 7

6x - 2y
= 6(7) - 2(5)
= 42 - 10
= 32

x= 12-y
y= 2x-9

**********SOLVING FOR X AND Y**********************


2(12-y)-9

y= 24-2y-9

y= 15-2y

-15 = -3y

y=5

___________

x + y = 12

x + 5 = 12

x = 12 - 5

x = 7

*********PLUGGING IN X AND Y VALUES FOR 6x-2y*******

6(7) - 2(5)

= 42-10

FINAL ANSWER: 32