7x-12(5/3-1/2)=8-2/3(x-9)
1个回答
7x-12(5/3-1/2)=8-2/3(x-9)
7X-20+6=8-2X/3+6
7X-14=14-2X/3
21X-42=42-2X
23X=84
X=4
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