(1)3x+2.4x= 6.2x= x= 验算:3×+2.4×= |
(2)0.8x-28.7=11.3 0.8x=40 x=5 验算:0.8×5-28.7=113 |
(3)(x-5)=75% x-= x= x=11 |
(4)6(0.6+x)= 4 3.6+6x= 4.5 6x=0.9 x=0.15 |
(5)36:72=14:x 36x=14×72 x=28 |
(6)5.6:x=3.6:1.8 3.6x=1.8×5.6 x=2.8 |
(7)x:20%=2: x= 40% x= |
(8)2.4:1.6=3.6:x 2.4x=3.6×1.6 x=2.4 |
(9)= 2.4x=7.5×25 x= |
(10)1.4:1=1:x 1.4x=1 x= |