15.6×X/100+4.3×Y/100=9.2 求X=?Y=?

15.6×X/100+4.3×Y/100=9.2 求X=?Y=? 若x、y互为相反数,则x+2x+3x+...100x+100y+99y+98y+...+y X+Y=7(100X+Y)-(10Y+X)=(10Y+X)-(10X+Y) 328-y/y x 100％=-18％ If two even number x,y satisfy equation x×x+100=y×y,x 求 X Y公式X+Y=50Y/X=3X+Y=100Y/X=3求 x y...公式 {x-y=100 {12%x-10%y=100 200/（100/x)+(100/y) 解方程：,(100-x-y)-(x+y)=2 {2x=y x/60+y/100=2.2 ｛x+y=100 0.7x+0.8y=74 1/5x^2y-x^4-y^2/100 x+y＝36 2x+4y＝100 x+y＝100 0.7x+0.8y＝74 6X+5y=100 x=?y=? X+Y=10009.93%x+25%y=100 x+y=22 2.5x+7y=100 x+y=32,2x+4y=100