①2x+47/8=4.875 ②2x+51/5=10−34/5 ③0.4×6+3x=4.8 ④9x-2.7÷0.03=0.

问题描述:

2x+4
7
8
=4.875
2x+5
1
5
=10−3
4
5
③0.4×6+3x=4.8 ④9x-2.7÷0.03=0.

(1)2x+478=4.875,   2x+478-4.875=4.875-4.875,             2x=0,          2x...