(27 x) 8=60解方程
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3x=27.3,x=9.1.再问:完整一点,谢谢再答:8x-27=5x+0.3,8x-5x-27=0.33x-27=.0.33x=0.3+27,3x=27.3x=9.1
8x-27=5x+0.38x-5x=0.3+273x=27.3x=27.3÷3x=9.1
9x=8.1x=8.1/9x=0.9
4x+3.6﹦8x-4.83.6+4.8=8x-4x4x=8.4x=2.175(x-0.75)=60x75x-75×0.75=60x75x-60x=75×0.7515x=75×0.75x=5×0.75
x+1.5x=8(1+1.5)x=82.5x=8x=8÷2.5x=3.2
解当x≥0时,原式化为5x-x=84x=8x=2当x<0时,原式化为5x-(-x)=86x=8x=4/3(舍去)方程的解为x=2
(x+20)+x=60-xx+20+x=60-x2x+20=60-x3x=40x=40/3
当X>=0时原方程变为 5X-X=8 即4X=8 X=2 满足 2 当X<0是5X+X=8&
x-60%x+28=50%x-9x-0.6x+28=0.5x-90.4x+28=0.5x-90.5x-0.4x=28+90.1x=37x=370
8x+27=5x8x-5x=273x=27x=9
8x-5x=273x=27x=27/3x=9
x-25%x=270.75x=27x=27÷0.75x=36
(x-8)+x=36x+x=36+82x=44x=22
我会再答:留给我再答: 再答:你是初三的?
8x-24-5x=278x-5x=27+243x=51x=17
x0所以x=8/3再问:已知关于x的方程2b=ax-3ax的解释x=1,其中a和b不等于0,求代数式a/b-b/a再答:x=12b=a-3a2b=-2ab=-a所以a/b=-1b/a=-1原式=-1-
x+8=4x移项,得:3X=8X=8/3
呵呵展开合并就可以啦8X-24-5X=273X=51x=17
X+60%X=0.5248X-25%X=0.5227X-35%X=0.52这道题相当于三道小题,可以分别解答,会得到三个答案.
x=602(x/45)+x/90-x/60=12x/90+x/90-x/60=13x/90-x/60=16x/180-3x/180=1x=60