Question

Solve this system algebraically.



9x + 2y = 5
y - 2x + 3 = 0

{(11/13, -17/13)}
{(-11/13, -17/13)}
{(-11/13, 17/13)}
{(11/13, 17/13)}

Answer 1

really confused

Answer 2

9x + 2y = 5
y - 2x + 3 = 0

Take the second equation, and solve it for y:

y - 2x + 3 = 0
y = 2x - 3

Now plug in this value for y into the first equation:

9x + 2(2x-3) = 5 and solve for x:

9x + 4x - 6 = 5
13x = 11
x = (11/13)

Now that you have x, plug it into either the first or second equation and solve for y.

y = 2x - 3
y = 2(11/13) - 3
y = 22/13 - (39/13)
y = -17/13

The answer to number 1 is: A

Answer 3

thx helped lots

Answer 4

You're welcome