Tìm x biết
13/20+(3/5-x)=5/8
2/5x+3/7=-4/5
1/2+3/4:x=1/3
X-2/99+x-2/100=x-2/101+x-2/102
3/(x+2)(x+5)+5/(x+5)(x+7)+7/(x+10)(x+17)=x/(x+2)(x+17) (với x € {-2;-5;-10;-17} )
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Sinh Học lớp 12
