Question

What is the solution of the system? Use elimination. 3x – 4y = 9 –3x + 2y = 9
A. (3, 9)
B. (–27, –9)
C. (–3, –6)
D. (–9, –9)

Answer 1

Are the equations like these: \(3x – 4y = 9\\–3x + 2y = 9\) ?

If so, just add the two equations to eliminate for the variable x, then solve for y.
After you solve for y, substitute the value that you found for y into any of the equations, then solve for x.

Answer 2

no its all togather

Answer 3

like this \(3x – 4y = 9 –3x + 2y = 9\) ?? ಠ_๏ you sure?

Answer 4

3x – 4y = 9 –3x + 2y = 9
consider 3x – 4y =9 -(1)
and 9 –3x + 2y = 9 -(2)
(1)+(2)
3x – 4y + ( 9 –3x + 2y) = 9+9
9-2y = 18
2y = 9
y = 9/2 = 4.5
put y= 4.5 into (1)
3x -4(4.5) = 9
3x = 27
x=9