2/3.x + 1/4 = 7/12
2/3.x = 7/12 - 1/4
2/3.x = 1/3
x = 1/3 : 2/3
x = 1/2
Bài làm
\(\frac{2}{3}x+\frac{1}{4}=\frac{7}{12}\)
\(\frac{2}{3}x=\frac{7}{12}-\frac{1}{4}\)
\(\frac{2}{3}x=\frac{7}{12}-\frac{3}{12}\)
\(\frac{2}{3}x=\frac{4}{12}\)
\(\frac{2}{3}x=\frac{1}{3}\)
\(x=\frac{1}{3}:\frac{2}{3}\)
\(x=\frac{1}{3}.\frac{3}{2}\)
\(x=\frac{1}{2}\)
Vậy \(x=\frac{1}{2}\)
2/3 .x + 1/4 = 7/12
2/3 .x = 7/12 - 1/4
2/3.x = 1/3
x = 1/3 : 2/3
x = 1/2
1/2 nhé bạn
x = 1/2
2/3.x=7/12-1/4
2/3.x=7/12-3/12
2/3.x=1/3
x=1/3:2/3
x=1/3.3/2
x=1/2