速度】55x*550+55(700-x)*495=7370 此方程怎么解?
问题描述:
速度】55x*550+55(700-x)*495=7370 此方程怎么解?
答
55x*550+55(700-x)*495=7370
x*550+(700-x)*495=134
550x-495x+346500=134
55x=134-346500
55x=-346366
x=-6297.5636