(1.8-4/5X)/1.2+(1.3-3X)/2+(1/2X-0.51)/0.6(1.8-4/5X)/1.2+(1.3-3X)/2=(1/2X-0.51)/0.6

x��)��0Գ�5�7���7�3�r�u��S�(B�@��PS�@��B[4�6IE���_5���v6�w4V�Ov,y�o瓝3��^ 1E�m�mkh����RפB�X�Rײ�ִB�T�,lhQakh
f6���yv �a�