3x-y=9
y=3x-9
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-9
x . 9 =12-3x9x =12-3x9x+3x=1212x =12x =1
Well if 3x+9=5 x=? Well you minus 9 from the side and then do 5-9 and that equals -4. Then you have to do -4 divided by 3. Which equals -1 so I believe x will equal -1.
Watch closely:6x = 3x + 27Subtract 3x from each side:3x = 27Divide each side by 3:x = 9
Solve this problem -x squared -40x- 80 =0