2(x﹣2.6)=8 ②7.8﹢3.2×2.5 ③0.5×2.4+3.6×0.5 ④中位数是(178),众数是
2x﹣5.2=8 =7.8﹢8 =1.2﹢1.8 (175),达到良好的5个,占
2x=8﹢5.2 =15.8 =3 十一分之五.
2x=13.2
x=13.2÷2
x=6.6
答案绝对正确
2(x﹣2.6)=8 ②7.8﹢3.2×2.5 ③0.5×2.4+3.6×0.5 ④中位数是(178),众数是
2x﹣5.2=8 =7.8﹢8 =1.2﹢1.8 (175),达到良好的5个,占
2x=8﹢5.2 =15.8 =3 十一分之五.
2x=13.2
x=13.2÷2
x=6.6
答案绝对正确