3分之x-2-4分之2x+3=5分之x-4分之5
20(x-2)-15(2x+3)=12x-75
20x-40-30x-45=12x-75
-10x-12x=85-75
-22x=10
∴x=-5/11
-7x+8=(x-2)+5分之1(x-1)
5*(-7x+8)=5*(x+2)+(x-1)
-35x+40=5x+10+x-1
-35x-6x=9-40
-41x=-31
∴x=31/41
3分之x-2-4分之2x+3=5分之x-4分之5
20(x-2)-15(2x+3)=12x-75
20x-40-30x-45=12x-75
-10x-12x=85-75
-22x=10
∴x=-5/11
-7x+8=(x-2)+5分之1(x-1)
5*(-7x+8)=5*(x+2)+(x-1)
-35x+40=5x+10+x-1
-35x-6x=9-40
-41x=-31
∴x=31/41