(1) | (2) | (3) | (4) |
3.5 | 12.5 | 1.2 | 8 |
(1)1.8+1.2x=3.6 1.2x=1.8 x=1.5 |
(2) 3x-8=19 3x=27 x=3 |
(3)3.6x-14.4=28.8 3.6x=43.2 x=12 |
(4)x+25-10=27 x+25=37 x=12 |
(5)x-0.24+0.76=5 x-0.24=4.24 x=4.48 |
(6)80x÷2=3.2 80x=6.4 x=0.08 |
⑴ | ⑵ | ⑶ | ⑷ |
36-a+b | 3x-12 | 2x+8 | 8x+2.5 |