7y-3.4y=0.72

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7y-3.4y=0.727y-3.4y=0.727y-3.4y=0.72楼上的全错了!方程要“解”字!7y-3.4y=0.723.6y=0.72y=0.72÷3.6y=0.2100%对!

7y-3.4y=0.72
7y-3.4y=0.72

7y-3.4y=0.72
楼上的全错了!方程要“解”字!
7y-3.4y=0.72
3.6y=0.72
y=0.72÷3.6
y=0.2
100%对!