优质解答
X-2/7X=3/470%X + 20%X = 3.6 25% + 10X =4/5X - 15%X = 68 X+3/8 X=1215X-3×5/21 =5/116X+5 =13.4 X÷(6/35) =(26/45) ×(13/25)2(x-0.6)=4(0.5+x)+x=9.8÷2 2(X+X+0.5)=9.8 25000+x=6x 3200=450+5X+X X-0.8...
X-2/7X=3/470%X + 20%X = 3.6 25% + 10X =4/5X - 15%X = 68 X+3/8 X=1215X-3×5/21 =5/116X+5 =13.4 X÷(6/35) =(26/45) ×(13/25)2(x-0.6)=4(0.5+x)+x=9.8÷2 2(X+X+0.5)=9.8 25000+x=6x 3200=450+5X+X X-0.8...