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What is the solution of the system? Use elimination.
3x - 4y = 9
-3x + 2y = 9
(one way is to subsitute since both equal 9 you do 3x-4y=-3x+2y then add 3x to both sides 6x-4y=2y add 4y to both sides 6x=6y divide by 6 x=y now subsitute 3x-4x=9 -x=9 multiply -1 x=9 x=y y=-9)
use elimination add them together to cancel x terms 3x-4y=9 -3x+2y=9 + 0x-2y=18 -2y=18 divide by 2 -y=9 multiply -1 y=-9 subsituete
3x-4y=9 3x-(4 times -9)=9 3x-(-36)=9 3x+36=9 subtract 36 from both sides 3x=-27 divide both sides by 3 x=-9
x=-9 y=-9
the answer is in (x,y) form (-9,-9) the answer is none of them (D is closest)
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