51-[26.5×0.375-(8.3-737/40)+A÷22/3]×4/45=50,A=_.
问题描述:
51-[26.5×0.375-(8.3-7
)+A÷237 40
]×2 3
=50,A=______. 4 45
答
51-[26.5×0.375-(8.3-73740)+A÷223]×445=50,[9.9375-8.3+7.925)+A×38]×445=1,[9.5625+A×38]×445=1,[9.5625+A×38]×445×454=1×454,9.5625+A×38=454,A×38=11.25-9.5625,A×0.375=1.6875,A=4.5....