ko có câu trả lời đó

=1210

\(\frac{3}{8}\) la kq cua mk

\(\frac{3}{4}\cdot\frac{2}{3}-\frac{3}{4}\cdot\frac{1}{6}\)

\(=\frac{3}{4}\cdot\left(\frac{2}{3}-\frac{1}{6}\right)\)

\(=\frac{3}{4}\cdot\frac{1}{2}=\frac{3}{8}\)

7*(7-1):2=21

2x + 46 = 100

2x = 100 - 46

2x = 54

x = 54 : 2

x = 27