2x加5乘0.8x加5(0.8x减0.2)等于29,
问题描述:
2x加5乘0.8x加5(0.8x减0.2)等于29
,
答
2x+5*0.8x+5*(0.8x-0.2)=29
2x+4x+4x-1=29
10x=30
x=3
答
2x+5*0.8x+5(0.8x-0.2)=29
2x+4x+4x-1=29
10x=30
x=3
答
2x加5乘0.8x加5(0.8x减0.2)等于29
2x+4x+4x-1=29
10x=30
x=3