a) \(\left(2x-25\right):13+51=8^2\)
\(\left(2x-25\right):13+51=64\)
\(\left(2x-25\right):13=64-51\)
\(\left(2x-25\right):13=13\)
\(\left(2x-25\right)=13.13\)
\(2x-25=169\)
\(2x=169+25\)
\(2x=194\)
\(x=194:2\)
\(\Rightarrow x=97\)
b) \(x^2:4+5^5:5^3=29\)
\(x^2:4+3125:125=29\)
\(x^2:4+25=29\)
\(x^2:4=29-25\)
\(x^2:4=4\)
\(x^2=4.4\)
\(x^2=16\)
\(x^2=4^2\)
\(\Rightarrow\orbr{\begin{cases}x=4\\x=-4\end{cases}}\)
a)
(2x-25):13+51=8^2
=> (2x-25):13+51=64
=> (2x-25):13=115
=> 2x-25 =115x13
=> 2x-25 =1495
=> 2x =1520
=> x =760
Vậy x=760
b)
x^2:4+5^5:5^3=29
=> x^2:4+5^2=29
=> x^2:4+25=29
=>x^2:4=4
=>x^2=16
=>x=4
Vậy x=4
a) \(\left(2,x-25\right)\div13+51=8^2\)
\(\left(2.x-25\right)\div13+51=64\)
\(\left(2.x-25\right)\div13=64-51\)
\(\left(2.x-25\right)\div13=13\)
\(\left(2x-25\right)=13.13\)
\(2x-25=169\)
\(2x=169-25\)
\(2x=144\)
\(x=144\div2\)
\(x=72\)
b)\(x^2\div4+5^5\div5^3=29\)
\(x^2\div4+5^2=29\)
\(x^2\div4+25=29\)
\(x^2\div4=29-25\)
\(x^2\div4=4\)
\(x^2=4\div4\)
\(x^2=1\)
\(x^2=1^2\)
\(\Rightarrow x=1\)
