x. 5 + x. 3= 73 ,6
x . ( 5+ 3) = 73, 6
x . 8 = 73, 6
x = 73, 6: 8
x =9 ,2
x x 5 + x x 3 = 73.6
x x (3+5) =73.6
x x 8 =73.6
x =73.6:8
x =9.2
Hok tốt!!!!!!!!!!!!!!!^^
\(5x+3x=73\times6\)
\(\Rightarrow8x=438\)
\(\Rightarrow x=438\div8\)
\(\Rightarrow x=54,75\)