(90+m)*1/2-(m*1/2)=x的解是几?救助各路数学天才!

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(90+m)*1/2-(m*1/2)=x的解是几?救助各路数学天才!(90+m)*1/2-(m*1/2)=x的解是几?救助各路数学天才!(90+m)*1/2-(m*1/2)=x的解是几?救助各路数学天

(90+m)*1/2-(m*1/2)=x的解是几?救助各路数学天才!
(90+m)*1/2-(m*1/2)=x的解是几?救助各路数学天才!

(90+m)*1/2-(m*1/2)=x的解是几?救助各路数学天才!
(90+m)*1/2-(m*1/2)=x
x=(90+m-m)/2
=45

x=45