X=1 X=1
1+5x=6 1+6x=7
1个回答
相关问题
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(6x-1/5)-1=5x-7/6
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1/4x5+1/5x6+1/6x7+.+1/39x40
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1/1x2x3x4+1/2x3x4x5+1/3x4x5x6+1/4x5x6x7+1/5x6x7x8+1/6x7x8x9+
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1/6x + 5/6x= 7/12
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5/9+x＝5/9 6/7-6/1x＝6/5
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解方程.X--1/5X=3/10,X/2/9=6/7,X+1/6X=7/6
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1-1/(x2+7x+6)=(x2-5x+5)/(x 2-5x+6)
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5.6x7.3+5.6x1.7+5.6用简便算法
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因式分解：（1）x^2-7x+6(2)x^2-5x+6(3)x^2-5x-6(4)x^2-7x+8(5)x^2-7x+1
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2.6x+1.9=7.1 5x-6=14