5.5x+6.7=7.8 28-x+3.6=20 3.5x-0.8x=11.34 8x-27.54÷2.7=1.8 6.2x-x=41.6 9x-14×5.5=58.

问题描述:

5.5x+6.7=7.8 28-x+3.6=20 3.5x-0.8x=11.34
8x-27.54÷2.7=1.8 6.2x-x=41.6 9x-14×5.5=58.

(1)5.5x+6.7=7.8,     5.5x+6.7-6.7=7.8-6.7,             5.5x=1.1,        5.5...