Toán Lớp 7: Câu 2. Tìm x biết:
a) 3/4+1/4:x=2/5
b) 11/12-(2/5+x)=2/3
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Toán Lớp 7: Câu 2. Tìm x biết:
a) 3/4+1/4:x=2/5
b) 11/12-(2/5+x)=2/3
Comments ( 2 )
1/4 :x=2/5-3/4
1/4 😡 =-7/20
x=1/4:(-7/20)
x=-5/7
Vậy x=-5/7
b) 11/12-(2/5+x)=2/3
11/12-2/5-x=2/3
31/60-x=2/3
x=31/60-2/3
x=-3/20
Vậy x=-3/20