Question

Tìm x:

2 x \(x\)+\(x\): 3 -20 = 13 x (98 - 26x3)

Answer 1

\(2x+x:3-20=13.\left(98-26.3\right)\)

\(\Rightarrow2x+\dfrac{1}{3}x-20=13.\left(98-78\right)\)

\(\Rightarrow\dfrac{7}{3}x=13.20+20\)

\(\Rightarrow\dfrac{7}{3}x=20.\left(13+1\right)\)

\(\Rightarrow\dfrac{7}{3}x=20.14\Rightarrow\dfrac{7}{3}x=280\)

\(\Rightarrow x=280:\dfrac{7}{3}=120\)

Chúc bạn học tốt!!!

Answer 2

\(2x+x:3-20=13(98-26.3)\)

\(2x+x:3-20=13.20\)

\(2x+x:3-20=260\)

\(2x+x:3=280\)

\(x\left(2+\dfrac{1}{3}\right)=280\)

\(\dfrac{7}{3}x=280\)

\(x=120\)