1.解17x=240+100 2.解 30%x=48 3解 x=550/110%x 4.解 120%x=200
x=340/17 x=48/30% x=500 x=200/120%
x=20 x=160 x=500/3(1)一辆汽车从甲地驶往乙地,行了全程的40%,离终点还有5千米,甲乙两地相距多少千米?(2)一辆汽车从甲地驶往乙地,行了全程的40%,离终点还有5千米,汽车行驶了多少千米?设全程为x千米。(1-40%)x=5 0.6x=5x=25/3 千米(2)∴25/3-5=10/3千米
解方程(1)17x-100=240(2)90%x-60%x=48(3)110%x=550(4)180%x-60%x=200
解方程(1)17x-100=240(2)90%x-60%x=48(3)110%x=550(4)180%x-60%x=200
数学人气:431 ℃时间:2020-02-06 05:23:33
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