解方程.40%X+60%=5 (1+56)X=1120 5X-3×710=75 4:x=12

日期:2016-05-15 10:00:00 人气:1

解方程.40%X+60%=5 (1+56)X=1120 5X-3×710=75 4:x=12

(1)40%X+60%=5, 40%X+60%-60%=5-60%, 40%x÷40%=4.4÷40%, x=11;(2)(1+56)X=1120, 116x=1120, 116x÷116=1120÷116, x=0.3;(3)5X-3×710=75, 5x-2110=75, 5x-2110+2110=75+2110, 5x÷5=3510÷5,
    A+
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