140/9 0.3 20 8 0.2 4.8 23/3
有7x+2x=140 9.3x+5.7x=4.5 6x+3x=180 7x-5x=16 7.8x-2.4x=1.08 5
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相关问题
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7x=2+3x 3.5x=28 5(x+8)-5=6(2x-7) 9(x-4)=7(4-x)
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3x3-1=8x1,5x5-3x3=16=8x2,7x7-5x5=24=8x3,9x9-7x7=32=8x4…… 你能发
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1/1x2x3x4+1/2x3x4x5+1/3x4x5x6+1/4x5x6x7+1/5x6x7x8+1/6x7x8x9+
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1)2x+8=16 (2)x/5=10 (3)x+7x=8 (4)9x-3x=6 (5)6x-8=4 (6)5x+x=9
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8x-3=9+5x.5x+2(3x-7)=9-4(2+x).[x−1/4−2x+16=1
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解下列方程 (1)2(x+5)=-4-x (2)6(7x+16)=7(8x-2) (3)3x-1=4x-(x-7) (4
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1/4x-1/2=3/4;7x-5/4=3/8;2x-1/6=5x+1/8;1/2x-7=9x-2/6;1/5x-1/2
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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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(3.5x-7)\6=8-4x 48-(7.5-x)*4=9x
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(7x-5)\4=3\8(2x-1)\6=(5x+1)\81\2 x-7=(9x-2)\61\5 x -1\2(3-2x