4xx3×0.7=6.5
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1.3x+0.5x=6.5+0.71.8x=7.2x=4
0.5x-0.7=6.5-1.3x0.5x+1.3x=6.5+0.71.8x=7.2x=7.2÷1.8x=4
原方程化为:1.3x+0.5x=0.7+6.5,整理得:1.8x=7.2,解得:x=4;
将未知数移动到左边,数字移到到右边得0.5x+1.3x=6.5+0.7即1.8x=7.2x=4
第一题:8-2x=0.88-0.8=2x2x=8-0.82x=7.2x=7.2/2x=3.6第二题:4x+2.1=6.54x=6.5-2.14x=4.4x=4.4/4x=1.1
5X+2.8=6.55X=6.5-2.8=3.7X=3.7/5X=0.74
1、4x+2.1=6.54x=6.5-2.14x=4.4x=1.12、0.95x-0.4x=550.55x=55x=55÷0.55x=1003、4x=36+1.64x=37.6x=37.6÷4x=9.
4(x+0.3)=4.8x+0.3=1.2x=1.2-0.3x=0.93*0.7+4x=6.52.1+4x=6.54x=6.5-2.14x=4.4x=1.15.5x-1.3x=12.64.2x=12.
(1)50%x+30%x=8, (50%+30%)x=8,
移项得:5x+1.3x=6.5+0.7,合并同类项得:6.3x=7.2,化系数为1得:x=87.
5/12x-x/4=1/3等式两边同乘以12得到5X-3X=4所以X=20.5x-0.7=6.5-1.3x等式两边同乘以10得到5X-7=65-13X所以X=93(x-7)+5(x-4)=15原式等于
4X-3*0.7=6.5(3*.07=2.1)4X-2.1=6.5+2.1+2.14X=8.6(8.6/4=2.15)X=2.15
4X+3*0.7=6.54x+2.1=6.54x=4.4x=1.12X/(1-0.72)=0.6152x/0.28=0.6152x=0.1722x=0.0861(X+4)-28=12x+4=40x=3
不可能,题目是错的XX3+XX6≠XXX33+6≠xx3
得心应手手到擒来铁血丹心心相印
X=65/11约等于5.91
二次型的矩阵A=200002023|A-λE|=2-λ000-λ2023-λ=-(λ-2)(λ-4)(λ+1)特征值为λ1=2,λ1=4,λ1=-1A-2E=0000-22021-->00000101
6.5是什么意思?再问:答数呗再答:。这个句号是什么?再问:小数点再答:噢再答:X=1.1再问:过程呢再答:稍等再问:额再答:4X+2.1=6.5再答:4X=4.4再答:X=1.1再答:行不?