Tìm X :
a) X – 6/12 = 1/4 b) x + 21/10 = 13,5 + 14/10
Tìm X : a) X – 6/12 = 1/4 b) x + 21/10 = 13,5 + 14/10
By Alice
By Alice
Tìm X :
a) X – 6/12 = 1/4 b) x + 21/10 = 13,5 + 14/10
a,x-$\frac{6}{12}$=$\frac{1}{4}$
x=$\frac{1}{4}$+$\frac{6}{12}$
x=$\frac{3}{4}$
b,x+$\frac{21}{10}$=13,5+$\frac{14}{10}$
x+$\frac{21}{10}$=$\frac{27}{2}$+$\frac{14}{10}$
x+$\frac{21}{10}$=$\frac{149}{10}$
x=$\frac{149}{10}$-$\frac{21}{10}$
x=$\frac{64}{5}$
Đáp án:
Giải thích các bước giải:
a) `x – 6/12 = 1/4`
`=> x = 1/4 + 6/12`
`=> x = 3/4`
b) `x + 21/10 = 13,5 + 14/10`
`=> x + 21/10 = 27/2 + 14/10`
`=> x + 21/10 = 149/10`
`=> x = 149/10 – 21/10`
`=> x = 64/5`