解2个方程:(120-50X)/5 =2*(50X-5X)/(50+5)+(120-50X)/50 和t=X+(120-50X)/5
问题描述:
解2个方程:(120-50X)/5 =2*(50X-5X)/(50+5)+(120-50X)/50 和t=X+(120-50X)/5
答
(120-50X)/5 =2*(50X-5X)/(50+5)+(120-50X)/50
(120-50X)/5 =2*45X/55+(120-50X)/50
24-10X=18X/11+12/5-X
10X+7X/11=24-12/5
117X/11=108/5
X=132/65
T=X+(120-50X)/5
T=X+24-10X
9X=24-T
X=(24-T)/9