已知8x-2.5×8=24.8,那么0.38+1.2x=_.
问题描述:
已知8x-2.5×8=24.8,那么0.38+1.2x=______.
答
8x-2.5×8=24.8
8x-20=24.8
8x=44.8
x=5.6
把x=5.6代入0.38+1.2x
=0.38+1.2×5.6
=0.38+6.72
=7.1
故答案为:7.1.