\(x+56-64=57\)
\(x+56\) \(=57+64\)
\(x+56\) \(=121\)
\(x=121-56\)
\(x=65\)
x+56-64=57
x+56 = 57+64
x+56 = 121
x = 121-56
x = 65
k mk nha pạn cảm ơn trước
x+56-64=57
x+56=57+64
x+56=118
x=118-56
x=62
nha bn k mình mình sẽ k lại nhé
x+56-64=57
x+56=57+64
x+56=121
x=121-56
x=65