x/28+(2x-14/35)=x/35+2x-14/28+12 解得多少

问题描述:

x/28+(2x-14/35)=x/35+2x-14/28+12 解得多少

5X+280x-56=4X+280X-70+12X140
X=56+12X140-70
X=1666

1426

x/28+(2x-14/35)=x/35+2x-14/28+12 x/28+(2x-2/5)=x/35+2x-1/2+12 x/28+2x-2/5=x/35+2x-1/2+12 x/28-2/5=x/35-1/2+12 x/28-x/35=2/5-1/2+12x/28-x/35=4/10-5/10+12x/28-x/35=12-1/10x/4-x/5=84-7/105x-4x=1680-1...

x/28+(2x-14/35)=x/35+2x-14/28+12
x=1666