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2x-7（x-1）+8=0 x=?
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解方程:1.6*0.7-0.12x=1 2.3x+7.7x-5=2.8
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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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7(X+3)-2(X-5)+3(X-1)-8=0
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0.625x...(8个0.625)x0.625x8x...(7个8)x8x2x2x...(6个2)x2
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1.8+x=2 x=?x-7.5=2.5 x=?1.2x=4.8 x=?x/0.5=12 x=?x+1.2=9.6 x=
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用方程解： 8x-27.54÷2.7=1.8和0.7x+0.5x=0.8+0.4
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2.1X+7.9X=6.9 5X+0.8×2=7.12X+5.8=8.2 6X-3×4=1.2
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x-0.8x=7.2