You can put this solution on YOUR website! 4x+6y=12
9y=-6x+18
6x+9y=18 Multiply the first equation by -1,5 & add.
-6x-9y=-18
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0x+0y=0 thus there is no solution.
These 2 equations are the same.
One equation with 2 unknowns is not solvable.