14x-7+12x-21-15x-10+4=0
14x+12x-15x=21+7+10-4
11x=34
x=34/11
7（2x-1)+3(4x-7)-5(3x+2)+4=0
7个回答
相关问题
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用线性代数解x1+3x2+5x3+7x4 =12,3x1+5x2+7x3+x4=0,5x1+7x2+x3+3x4=1,7
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1/2x+3=1/3x+2 0.5x-0.7=6.5+0/2x 1-7/3x=2/3x+19 0.4x-1/4=8-1/
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(4.5-x)*7=17.5 x/2+4=3/2x+1 7/2*2/3-4x=7/3 5/8(x-.3)=75% 1+x
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5/12x-x/4=1/3 0.5x-0.7=6.5-1.3x 3(x-7)+5(x-4)=15 (y-1)/2=2-(
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解方程5x-2+1.8=3.6 7（x-1.2）=2.1 9.4x-0.4x=16.2 0.2x-0.4+0.5=3.7
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X1 - X3 - X4 -5X5=0 X1+2X2+3X3+3X4+7X5=0 X1+X2+X3+X4+X5=0 X2
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解齐次线性方程组,x1+x2-x3-x4=0,2x1-5x2+3x3+2x4=0,7x1-7x2+3x3+x4=0,线性
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一元一次方程1、2x-1/3=x+2/4-12、5x-2=7x+83、（3x-7/0.4）-（x-0.5/6.5）-（x
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15-2x=7.5 1.6÷x=2.4÷0.15 2.7÷0.3-7x=5.5 18x-4x-2.5x=3.68 3.6
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解方程.(1)1.8+x=5.2 (2)x-2.7=5.6 (3)0.7*x=4.2 (4)x/1.7=2.5