
x十(2x一3);-6一(3x一4);a十2(a一3);-3(a十1)一2(3a一1)
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x十(2x一3);
=x+2x-3
=3x-3
-6一(3x一4);
=-6-3x+4
=-2-3x
a十2(a一3);
=a+2a-6
=3a-6
-3(a十1)一2(3a一1)
=-3a-3-6a+2
=-9a-1
=x+2x-3
=3x-3
-6一(3x一4);
=-6-3x+4
=-2-3x
a十2(a一3);
=a+2a-6
=3a-6
-3(a十1)一2(3a一1)
=-3a-3-6a+2
=-9a-1
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