\(\frac{x}{7}=\frac{x+36}{35}\)
\(\Rightarrow x.35=7.\left(x+36\right)\)
\(\Rightarrow35x=7x+252\)
\(\Rightarrow35x-7x=252\)
\(\Rightarrow28x=252\)
\(\Rightarrow x=9\)
\(\frac{x}{7}=x+\frac{36}{35}\)
\(\Leftrightarrow x=7x+\frac{36}{5}\)
\(\Leftrightarrow6x=-\frac{36}{5}\)
\(\Leftrightarrow x=-\frac{6}{5}\)
dễ mà:
x/7=x+36/35
x=7x+36/5 (nhân 2 vế với 7)
x-7x=36/5
-6x=36/5
x= -6/5
Nêú thế thì
\(\frac{x}{7}\)= \(\frac{x+36}{35}\)
x.35=(x+36).7
x.35=7x-252
35x-7x=252
42x=252
x=6