4.8+x=12.4 *x-6.8=19.6
x÷1.5=2.4 *0.9x=1.17
9.2-x=4.8 18÷x=7.2
x÷8=4.2 57﹣x=39 2x+3x=7.5
25.6-x=13
解:25.6-x+25.6=13+25.6
x=38.6( )
改正:
①x+1.75=3.4
②9x=0.27
③x-2.08=4.25
④x÷1.2=1.2
解:12-x+□=2.8◯□
2.8+x=12
2.8+x-2.8=12◯□
x=□
解:6.3÷x◯x=0.7◯□
0.7×x=6.3
0.7x◯□=6.3◯□