(X+36)/(X-18)=7 怎么解

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/22 10:09:48
(X+36)/(X-18)=7怎么解(X+36)/(X-18)=7怎么解(X+36)/(X-18)=7怎么解x+36=7(x-18)x=27两边乘以分母可得x+36=7(x-18),得x=27,并验证

(X+36)/(X-18)=7 怎么解
(X+36)/(X-18)=7 怎么解

(X+36)/(X-18)=7 怎么解
x+36=7(x-18)
x=27

两边乘以分母可得x+36=7(x-18),得x=27,并验证,27不等于18,故x=27

(x+36)/(x-18)=7
x+36=7(x-18)
x+36=7x-7*18
36-7*18=7x-x
36-126=6x
-90=6x
x=-90/6
x=-15

等于27啊
(X+36)/(X-18)=7
(X-18)*7=X+36
7X-126=x+36
7X-X=36+126
6X=162
X=27