5x+3y=9
2x-4y=40

29174

  (x, y) = (6, -7)

Step-by-step explanation:

Assuming you want to solve the equations for x and y, you can divide the second equation by 2 to get

  x -2y = 20

then add 2y to obtain an expression for x:

  x = 20 +2y

Substituting this into the first equation gives ...

  5(20 +2y) +3y = 9

  100 +13y = 9 . . . . . . eliminate parentheses, collect terms

  13y = -91 . . . . . . . . . .subtract 100

  y = -7 . . . . . . . . . . . . .divide by 13

Using this in our expression for x, we find ...

  x = 20 +2(-7) = 6

The solution is (x, y) = (6, -7).

i dont know what you want me to answer for this but im guessing 2: 11?