若2x+3y=0,则2x+7y/4x-2y=______.要完整过程.(y不等于0)
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若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
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若x-y不等于0,2x-3y=0,则分式(10x-11y)/(x-y)的值是()?(10x-11y)/(x-y) =[(8x-8y)+(2x-3y)]/(x-y) =8为什么8X-8Y=8?(10x-11y)/(x-y)=[(8x-8y)+(2x-3y)]/(x-y)=8+(2x-3y)]/(x-y)=8+0=8
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若线段x ,y 满足[2x-3y]*[3x+2y]=0 则x/y=?