请你在下面算式的空格内填入合适的数字，使竖式成立。
能简则简+++= ﹣（+）=×÷=﹣+= ××=×÷6=
直接写得数．+= ÷= ﹣= +=+=++= +﹣= ×9=×= ÷= ×= ÷=
解方程x﹣=； 4x+=； x﹣0.3x=21．
计算（能简算的要简算）﹣+=××=÷÷=
直接写得数+= 1﹣= ﹣= ﹣=×= ×= 0×=÷6=÷8= 2﹣= ÷=÷=
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÷6=
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