(8.4*3+7.12*X)/(X+3)=7.60怎么解
问题描述:
(8.4*3+7.12*X)/(X+3)=7.60怎么解
答
8.4*3+7.12*X=7.60*(X+3)
8.4*3+7.12*X=7.60*X+7.60*3
7.60*X-7.12*X=8.4*3-7.60*3
0.48X=0.8*3
X=5