<span>10-(9x-2y)=18-4y</span>
<span>2x-3(1+y)=2(3x-y)</span>
<span>2x-3(1+y)=2(3x-y)</span>
<span>2x-3-3y-6x+2y=0</span>
<span>-4x-3-y=0</span>
y=-4x-3
<span>10-(9x-2y)=18-4y</span>
<span>10-9x+2y-18+4y=0</span>
<span>-8-9x+6y=0</span>
<span>-8-9x+6*(-4x-3)=0</span>
<span>-8-9x-24x-18=0</span>
<span>-26-33x=0</span>
x=-26/33
-4*(-26/33)-3-y=0
104/33-3-y=0
y=5/33