如题所述
3.6x+0.7-0.7=12.9-0.7
3.6x=12.2
3.6x÷3.6=12.2÷3.6
x=61/18
3.6x=12.2
3.6x÷3.6=12.2÷3.6
x=61/18
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第1个回答 2015-01-29
解：3.6x+0.7=12.9
3.6x+0.7-0.7=12.9-0.7
3.6x=12.2
3.6x/3.6=12.2/3.6
x=3.39
3.6x+0.7-0.7=12.9-0.7
3.6x=12.2
3.6x/3.6=12.2/3.6
x=3.39
第2个回答 2015-01-29
3.6x+0.7=12.9
解 3.6x =12.9-0.7
3.6x =12.2
x =61/18
解 3.6x =12.9-0.7
3.6x =12.2
x =61/18
