(3 6/7+3/14)*x=2/7*3 1/2

1) 3(6/7) + 3/14 = 3(12/14) + 3/14 = 3( 15/14) = 4 1/14 ; 2) 2/7 * 3 (1/2) = 2/7 * 7/2 = 1 ; 3) X = 1 : 4 (1/14) =1 : 57/14 = 14/57.

[latex](3 \frac{6}{7}+ \frac{3}{14})*x= \frac{2}{7}*3 \frac{1}{2} \\ \\ (\frac{27}{7}+ \frac{3}{14})*x= \frac{2}{7}*\frac{7}{2} \\ \\ (\frac{54}{14}+ \frac{3}{14})*x= 1 \\ \\ \frac{57}{14}x=1 \\ \\ x= \frac{14}{57} [/latex]