49+0.009*0.5X=18+0.04*0.5X解这个方程全步骤

问题描述:

49+0.009*0.5X=18+0.04*0.5X解这个方程全步骤

49+0.009*0.5X=18+0.04*0.5X
49-18=0.04*0.5X-0.009*0.5X
0.0155 X=31
x=2000

49+0.009*0.5X=18+0.04*0.5X
49+0.0045x=18+0.02x
0.02x-0.0045x=49-18
0.0155x=31
x=2000

49+0.009*0.5X=18+0.04*0.5X
全部乘以1000得
49000+9*0.5x=18000+4*5x
49000+4.5x=18000+20x
15.5x=31000
x=2000