求未知数x。
|
| (1)147÷5x=9.8 5x=147÷9.8 5x=15 x=3 | (2)160×25%-1.3x=17.9 40-1.3x=17.9 1.3x=22.1 x=17 |
(3) x+ x=3.3 x=3.3x=3.6 | (4)0.8×(x-0.2)=1 0.8x-0.16=1 0.8x=1.16 x=1.45 |
(5)2%x×15+ =1130%x+ =11x=35 | (6) - =0.4 =0.4x=12 |
(7)10:x=9:![]() 9x=16 x= ![]() | (8)1 :1 =x:![]() x=1x= ![]() |
| (9)3(x+2)=4(x+1) 3x+6=4x+1 x=5 | (10) =![]() 0.6x-0.3=0.5x+0.5 x=8 |
x+
x=3.3
=11
-
=0.4
:1
=x:
=
x=3.3
=0.4
x=1