\(\left(2x+5\right)+\left(4x+20\right)=5x+34\)
\(\Leftrightarrow\left(2x+5\right)+\left(4x+20\right)-\left(5x+34\right)=0\)
\(\Leftrightarrow2x+5+4x+20-5x-34=0\)
\(\Leftrightarrow x-9=0\)
\(\Leftrightarrow x=9\)
Vậy x=9
(2x + 5) + (4x + 20) = 5x + 34
\(\Rightarrow\) (2x + 4x) + (5 + 20) = 5x + 34 (Tính chất giao hoán)
\(\Rightarrow\) 6x + 25 = 5x + 34
\(\Rightarrow\) x = 9 (Mỗi vế bớt đi 5x + 25)
Vậy, x = 9
\(\left(2x+5\right)+\left(4x+20\right)=5x+34\)
\(\left(2x+5\right)+\left(4x+20\right)=5x+34 \)
\(\Leftrightarrow2x+5+4x+20-5x-34=0\)
\(\Leftrightarrow x-9=0\)
\(\Leftrightarrow x=9\)
Vậy x=9
