a+2a= 8b-b= y+9y= x+7x-4x=ax2a= 8ax2a= 10a-3a= 10a-a=
问题描述:
a+2a= 8b-b= y+9y= x+7x-4x=ax2a= 8ax2a= 10a-3a= 10a-a=
答
a+2a=3a
8b-b=7b
y+9y=10y
x+7x-4x=4x
ax2a=2a^2(a^2表示a的平方,下同)
8ax2a=16a^2
10a-3a=7a
10a-a=9a