(4-x)/3=(x-3)/5-1 5(4-x)=3(x-3)-15 20-5x=3x-9-15 -8x=-44 x=11/2 3分之1.5x-1-0.6分之x=0.5 (3x-2)/6-10x/6=1/2 3x-2-10x=3 -7x=5 x=-5/7
