去括号:2(x+3)= -3(2y+3)=
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去括号:2(x+3)= -3(2y+3)=
去括号:2(x+3)= -3(2y+3)=
去括号:2(x+3)= -3(2y+3)=
2x+6=-6y-9
移项,得
2x+6y= -15
2x+6y+15
2(x+3)= -3(2y+3)
去括号:2x+6= -6y-9
移项 : 2x+6y= -15
2x+6y= -15
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