(9.8-1.8x)×7=18.2 2.6x=51.6-3.4x 3(4x-2)-2(3x+3)=9-8x 20+4x=6x-24 5(x-1)=x+1 3(3x-2)=10-0.5(x-3.5) 0.4(x-0.2)+1.5=0.7x-0

问题描述:

(9.8-1.8x)×7=18.2
2.6x=51.6-3.4x
3(4x-2)-2(3x+3)=9-8x
20+4x=6x-24
5(x-1)=x+1
3(3x-2)=10-0.5(x-3.5)
0.4(x-0.2)+1.5=0.7x-0.38
(0.6x+420)÷(x+20)=3
35(2-x)+15(6-5x)=22x+7+21(4-3x)

(1)(9.8-1.8x)×7=18.2,  (9.8-1.8x)×7÷7=18.2÷7,            9.8-1.8x=2.6,       9.8-1.8x+1.8x=2.6+1....