715
x+y=10x100/80
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相关问题
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100(95-x) - 80(100-x) = 100 (240-x)/x*100%=20% (100%-10%)*y=
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(x+60)*(100%+10%)-x(100%-80%)=120 求
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解不等式①100x+100y≤1000.②80y≤100x.③x+2y=15
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(100-100x)^2+(80-80x)^2=(10√41)^2简便计算
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X+Y=7(100X+Y)-(10Y+X)=(10Y+X)-(10X+Y)
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{x-y=100 {12%x-10%y=100
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(80 + x/20)*10 = x + 100怎么解?
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求证(10x+y)[10x+(10-y)]=100x(x+1)+y(10-y)恒为等式
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Y=(X-8)[100-10(X-10)]
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解方程：100-X=80-X100-X=80+X