Question

a + b = 345
c+ b = 33400
a+c=575​

Answer 1

$\begin{cases}a + b = 345 \\ c + b = 33400 \\ a + c = 575\end{cases} \\\implies a = 345 - b \\\implies c = 33400 - b \\ \\ \iff \: a + c = 575 \\ 345 - b + 33400 - b = 575 \\ 33745 - 2b = 575 \\ - 2b = - 33170 \\ \color{aquamarine}b = 16585 \\ \\ \implies \: a = 345 - b \\ \color{aquamarine}a = - 16240 \\ \\ \implies \: c = 33400 - b \\\color{aquamarine} c = 16815$