2(0.3x+4)-5(0.2x-7)=9怎么做

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2024-12-25 03:04:38
推荐回答(4个)
回答1:

乘开:0.6x+8-x+35=9
合并:-0.4x+43=9
移向:-0.4x=-34
计算:x=85

回答2:

0.6x+8-x+35=9,合并同类项得-0.4x=-34,解得x=85.

回答3:

展开 0.6x+8-x+35=9 解得x=35

回答4:

2(0.3x+4)-5(0.2x-7)=9
0。6x+8-x+35=9
-0.4x=9-43
-0.4x=-34
x=85