Question

( 550 - x ) + 7 mũ 2 = 109

 

Answer 1

\(\left(550-x\right)+7^2=109\)

\(\left(550-x\right)+49=109\)

\(550-x=109-49\)

\(550-x=60\)

\(x=550-60\)

\(x=490\)

Answer 2

\(\left(550-x\right)+7^2=109\)

\(\Rightarrow\left(550-x\right)+49=109\)

\(\Rightarrow550-x=109-49\)

\(\Rightarrow550-x=60\)

\(\Rightarrow x=550-60\)

\(\Rightarrow x=490\)

Vậy: x=490