14700/(1-50%)=29400
解析 210×7=1470 21×70=1470 420×70=29400 21×140=2940 根据已知算式 210 × 70 = 14700,利用积的变化规律,可以得出: * 210 × 7 = 14700 ÷ 10 = 1470 * 21 × 70 = 14700 ÷ 10 = 1470 * 420 × 70 = 14700 × 2 = 29400 * 21 × 140 = 14700 ÷ 10 × 2 = 2940...
14700×x+2260×y=67525.5 一个式子有两个未知数,没法解。换句话说,这是二元一次方程,必须有两个式子才能解。
先按照目前的数据做 出货时 借:应收账款 198311.65 贷:主营业务收入 198311.65 收款时 ...
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