(1/9+3/5)*18*15简算
问题描述:
(1/9+3/5)*18*15简算
一直做不上啊
还有一个10(x-2)=5(x+7)
答
(1/9+3/5)*18*15
=1/9x18x15+3/5x18x15
=2x15+3x18x3
=30+162
=192
10(x-2)=5(x+7)
10x-20=5x+35
10x-5x=35+20
5x=55
x=55÷5
x=11