\(\rightarrow\left[81-\left(64+14\right):13\right]a=25+100\\ \rightarrow\left[81-78:13\right]a=125\\ \rightarrow\left[81-6\right]a=125\\ \rightarrow75.a=125\rightarrow a=125:75\\ \rightarrow a=\dfrac{5}{3}\)
\(\Leftrightarrow\left[81-\left(64+14\right):13\right]\cdot a=25+100=125\)
\(\Leftrightarrow75\cdot a=125\)
hay a=5/3
\(\left[3^4-\left(8^2+14\right):13\right]x=5^2+10^2\)
\(\Rightarrow\left[81-\left(64+14\right):13\right]x=25+100\)
\(\Rightarrow\left[81-78:13\right]x=125\)
\(\Rightarrow\left[81-6\right]x=125\)
\(\Rightarrow75.x=125\)
\(\Rightarrow x=125:75\)
\(\Rightarrow x=\dfrac{125}{75}=\dfrac{5}{3}\)
[81−(64+14):13]⋅a=25+100=125⇔[81−(64+14):13]⋅a=25+100=125
75⋅a=125⇔75⋅a=125
hoặc A=5/3
