Question

( y + 10) + ( y + 11) + ( y +12) +….+ ( y + 38) = 197

Answer 1

\(\Leftrightarrow29y+696=197\)

hay y=-499/29

Answer 2

\(\Rightarrow29y+\left(10+11+12+...+38\right)=197\\ \Rightarrow29y+\dfrac{\left(38+10\right)\cdot29}{2}=197\\ \Rightarrow29y+696=197\\ \Rightarrow29y=-499\\ \Rightarrow y=-\dfrac{499}{29}\)