\(49:x+56:x=7\\ \Rightarrow\left(49+56\right):x=7\\ \Rightarrow105:x=7\\ \Rightarrow x=105:7\\ \Rightarrow x=15\)
Từ đề bài => (49+56):x=7
=>x=(49+56):7=15
Kết luận...
49 : x + 56 : x = 7
(49 + 56) : x = 7
105 : x = 7
x = 105 : 7
x = 15
\(19,\Leftrightarrow\left(49+56\right):x=7\Leftrightarrow105:x=7\Leftrightarrow x=15\)
Vậy: ...
\(\rightarrow\left(49+56\right)\div x=7\)
\(\rightarrow105\div x=7\)
\(\rightarrow105\div7\)
\(\rightarrow=15\)