4.2X- 2.7×4=6X-15.8

问题描述:

4.2X- 2.7×4=6X-15.8

4.2X- 2.7×4=6X-15.8
4.2X- 10.8=6X-15.8
6X-4.2X=15.8-10.8
1.8X=5
X=5÷1.8
X=25/9