1. 15m-12n-12m+8n=3m-4n
2. 0.6x+4.2-0.5x+1.5=0.1x+5.7
3. 0.3x-0.6-0.2x-0.8=0.1x-1.4
4. 0.5x-1.5 -0.6x -2.4=-0.1x-3.9
1. 15m-12n-12m+8n=3m-4n
2. 0.6x+4.2-0.5x+1.5=0.1x+5.7
3. 0.3x-0.6-0.2x-0.8=0.1x-1.4
4. 0.5x-1.5 -0.6x -2.4=-0.1x-3.9