(1)已知:8x=44.8,那么:0.38+1.2x=_ (2)已知:6x=36,那么:7x-_=29.5.
问题描述:
(1)已知:8x=44.8,那么:0.38+1.2x=______
(2)已知:6x=36,那么:7x-______=29.5.
答
(1)8x=44.8,
8x÷8=44.8÷8,
x=5.6;
0.38+1.2×5.6,
=0.38+6.72,
=7.1;
(2)6x=36,
6x÷6=36÷6,
x=6,
7×6-29.5,
=42-29.5,
=12.5;
故答案为:7.1、12.5.