Question

Tìm X:

(x + 4) + (x + 6) + ... + (x + 26) = 210

 

Answer 1

\(\left(x+4\right)+\left(x+6\right)+...+\left(x+26\right)=210\)

<=> \(\left(x+x+...+x\right)+\left(4+6+...+26\right)=210\)

<=> \(12x+180=210\)

<=> \(12x=30\)

<=> \(x=\frac{5}{2}\)

Answer 2

\(\left(x+4\right)+\left(x+6\right)+...+\left(x+26\right)=210\)

\(\Leftrightarrow\left(x+x+...+x\right)+\left(4+6+...+26\right)=210\)

\(\Leftrightarrow12x+180=210\Leftrightarrow x=\frac{5}{2}\)

Answer 3

\(\left(x+4\right)+\left(x+6\right)+...+\left(x+26\right)=210\)

\(\Leftrightarrow\left(x+x+...+x\right)+\left(4+6+...+26\right)=210\)

\(\Leftrightarrow12x+180=210\Leftrightarrow x=\frac{5}{2}\)