(180-x)除以(90-x)=3怎么求那(180-x)-2(90-x)=10,回答这一题后给分

问题描述:

(180-x)除以(90-x)=3怎么求
那(180-x)-2(90-x)=10,回答这一题后给分


180-X=3*(90-X)
180-X=270-3X
2X=90
X=45

(180-x)=3(90-x)
180-x=270-3x
2x=90
x=45

1、二边同乘(90-X):180-X=3*(90-X)
2、180-X=270-3X
3、90=2X
X=45

(180-x)/(90-x)=3
==> 180-x=270-3x
==> 2x=90
==> x=45
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
对于你问题的补充
(180-x)-2(90-x)=10
==>180-x-180+2x=10
==>x=10

(180-x)/(90-x)=3
180-x=270-3x
180=270-2x
2x=90
x=45
(180-x)-2(90-x)=10
180-x-180+2x=10
x=10

四十五