解方程.
| (1)3x+2×7=50 | (2)12(x+3.7)=144 | (3)5x-3×11=42 |
| (4)7.2x-3.6x=9×0.4 | (5)x-0.8x+0.7x=8.1 | (6)1.8×2-0.3x=2.4. |
| (1)3x+2×7=50 | (2)12(x+3.7)=144 | (3)5x-3×11=42 |
| (4)7.2x-3.6x=9×0.4 | (5)x-0.8x+0.7x=8.1 | (6)1.8×2-0.3x=2.4. |