3.8x-0.8x=4.5怎么解
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3.5x+0.5x=12.84x=12.8x=3.2x-0.5x=10.50.5x=10.5x=210.8x+4=7.20.8x=3.2x=4
原式化为-2x+5+27=5x-7得7x=39得x=39/7
3x+4.5x=13.5(3+4.5)x=13.57.5x=13.5x=9/557.8x-0.8x=285(57.8-0.8)x=28557x=285x=5
5x+0.5x*3.8=5.525x+1.9x=5.526.9x=5.52x=5.52/6.9x=0.8--题目中少一加号--
x*2x=(x+3)*2x-242x²=2x²+6x-246x=24x=24÷6x=4
3.8X+5.2X=19.989X=19.98X=19.98/9X=2.22
3-0.2=1.2X-0.8X2.8=0.4XX=7
X=0.8X+2500X-0.8X=25000.2x=2500x=12500
2.5x=75x=30再答:1+1.5再答:然后75除以2.5
4.8x+10.7x=4.96;15.5x=4.96;x=0.32;x-0.8x=3.60.2x=3.6;x=18;手机提问的朋友在客户端右上角评价点【满意】即可.再问:请用等式的性质解答,O(∩_∩
14再答:1.5x+2=9+x再答:0.5x=7再答:x=14
4x+21=39-4.5x9.5x=60x=6.3157894再答:改:9.5x=18x=1.8947698再答:怎么出来小数了再答:太坑了再答:题有问题?再问:就这样再答:1.8947368再答:.
X-30%X-[(X-30%X)×20%-2]-30%X=28X-0.3X-(0.7X×0.2-2)-0.3X=280.7X-0.14X+2-0.3X=280.7X-0.14X-0.3X=28-20.
3.8x-x=0562.8x=0.56x=0.56/2.8x=0.2
首先,先证明:当0
x-0.8x=7.2合并同类项0.2x=7.2x的系数化为1x=72/2x=362.8x+x=26.6合并同类项3.8x=26.6x的系数化为1x=266/38x=7
x-0.5x=3(1-0.5)x=30.5x=3x=6
0.8x+16=x-120.2x=28x=140